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(left) A newly constructed Portable Farms® Aquaponics System prior to planting or installing the fish in the fish tanks.
(right) 40 days after the seedlings were planted in the Grow Tables and the fish were installed in the fish tanks.

If video is not visible, please UNBLOCK your browser to allow YouTube to play.
View a 2-minute video clip of the interior of 16 x 33′ Portable Farms® Aquaponics Systems – This small 16 x 33′ Portable Farms® Aquaponics Systems (in above video) feeds ten people the table vegetables and protein (tilapia) the food they need for optimal health – forever in 528 sq ft total space and 264 square ft grow space. This YouTube video has been viewed more than 56,100 times.


Enroll in our online course and learn to assemble and operate
a Portable Farms® Aquaponics System. After satisfactory graduation from our online course, you will receive a Portable Farms Kit.

Most students complete this online course in about twelve hours. It’s self-paced and you have one year to complete the course. Many families install a backyard aquaponics system over a weekend assuming they have some basic skills for home repair and have access to repair tools.

You can learn everything you need to know about building your own aquaponics system and growing healthy food by taking our FUN and easy-to-follow ONLINE correspondence course.

  • Let us teach you how to grow healthy fish and vegetables so you can become increasingly self-sustaining.
  • Our 45 years of experience in aquaponics is now available to teach you how to feed your family FOREVER. [Read our History: CLICK HERE] It only takes a few days to learn the areas related to assembling an aquaponics system  so you can build your own Portable Farms® Aquaponics System!
  • Aquaponics is easier and more productive than gardening or traditional agriculture and uses 95% less water. Portable Farms® Aquaponics Systems also use less electricity and less labor than any other aquaponics system in the world.
  • To view photos of food that is commonly grow in Portable Farms® Aquaponics Systems: CLICK HERE.

Aquaponics is easier and more productive than organic gardening or traditional agriculture and uses 95% less water. Portable Farms® Aquaponics Systems also use less electricity and less labor than any other aquaponics system in the world.

 farm 8 18 2012

Portable Farms® Aquaponics System in Southwest Florida is OFF GRID AND SOLAR.

CLICK HERE to read article and view more images of this farm.

newfarm plantedThis new Portable Farms® Aquaponics System (above) is fully solar powered. This new Portable Farms® Aquaponics System has one grow tray that is 6’x16’ (96 sq ft of grow space) which feeds four people FOREVER. 

FF (Fish Friendly) 100% Natural Mineral Rock Dust

To Read Entire Article: CLICK HERE.

Kale and Bok Choy grown with FF Mineral Rock Dust in Portable Farms by Phyllis Davis, co-inventor, Portable Farms.


Just sprinkle on your seeds when planting. That’s all there is to it.

FISH POOP provides Nitrogen and Trace Minerals, but it NOT ENOUGH to grow healthy greens and blooming plants in aquaponics year round.

Our FF Mineral Rock Dust includes:
– Iron
– Magnesium
– Calcium
– Potassium (vital for blooming plants, tomatoes, peppers, cucumbers, etc.)
– It also includes other trace elements for successful growing in your aquaponics or hydroponic system and it is FISH SAFE. 

Just sprinkle FF MINERAL ROCK DUST ROCK on your growing medium, water the medium and then plant your seeds. It’s as easy as that.
Lack of sufficient trace elements in fish waste is one of the key reasons aquaponics has been slow to commercialize. UNTIL NOW. PFAS LLC Announces FF (Fish Friendly) Mineral Rock Dust for use in your aquaponics or hydroponics systems for healthier and better TASTING greens and blooming plants.

One head of tokyo bekana (a mild Asian green) and one head of Swiss Chard grown with FF Mineral Rock Dust by Colle Davis, lead inventor, Portable Farms.

 For more information about FF Mineral Rock Dust and Q & A’s: CLICK HERE.

To Order FF Mineral Rock Dust: CLICK HERE. (Ships from San Diego, California)

FF Mineral Rock Dust for Aquaponics – 5 lbs.- $29.95 + shipping

FF Mineral Rock Dust for Aquaponics – 10 lbs. – $39.95 + shipping

FF Mineral Rock Dust for Aquaponics – 44 lbs. – $109.95 + shipping

Export Minimum Order outside the US is 2200 lb./1000kg tote

One head of India mustard, an Asian green grown with FF Mineral Rock Dust grown by Phyllis Davis.

tilapia Oreochromis mossambicus

Enjoy Tilapia as a Low Calorie, Low Fat, High Protein Alternative to a Skinless Chicken Breast

* 4 oz Tilapia fillet – 105 calories, 1 gram fat, 23 grams protein

* 4 oz skinless chicken breast – 140 calories, 2 grams fat, 33 grams protein

Read Five E-books (download) about Aquaponics-Related Topics
Written by Colle and Phyllis Davis,
Portable Farms® Aquaponics Systems.

Commercial Aquaponics GOLD

CLICK ON THE CRAZY PROFESSOR to see our FUN new animation of 
Colle Davis, Lead Inventor, Portable Farms® Aquaponics Systems: OR CLICK HERE.

Aquaponics GOLD

Listen to Phyllis Davis tell you about AQUAPONICS GOLD: CLICK HERE.

Backyard Aquaponics GOLD

An overview for those considering the option of installing an

aquaponics system near their home.

Greenhouse & Warehouse Aquaponics GOLD

This ebook discloses the facts, figures and formulas necessary for successful greenhouse and warehouse aquaponics growing. 

Solar Aquaponics GOLD

Let us show you HOW, WHY, WHAT, WHERE and HOW MUCH it costs to install your own solar powered system for YOUR aquaponics system.

Phyllis Davis, Co-Inventor, Harvesting fresh greens from their Portable Farms.

 Phyllis Davis, Co-Inventor, Portable Farms® Aquaponics Systems holding a freshly harvested bouquet of fresh greens.


To find out what is IN the Portable Farms®  Kit and what is NOT in the Portable Farms®  Kit , please request the FREE AND INSTANTANEOUS PRICE LIST (top right box on every page of this website). One Portable Farms Kit provides you with the technology to assemble one module which feeds 8 people. Want to feed more people? Then order more Portable Farms®  Kits. Yes, it’s THAT EASY.

– Most students complete our new online course in a few days and then we ship you a Portable Farms® Kit so you can build your own system.

– What’s in the Portable Farms® Kit? It’s listed in the FREE PRICE LIST (right top column on every page of this website.

Phyllis Davis harvesting fresh delicious basil from Portable Farms Aquaponics System.

Portable Farms® Aquaponics Systems  Are the Most 
Productive and Reliable Aquaponics Systems in the World

  • Portable Farms® grow food in greenhouses, warehouses or underground structures.

  • Without the use of any pesticides, harsh chemicals, antibiotics or hormones. 

  • Portable Farms® use 95% less water than traditional agricultural methods.

  • Portable Farms® use less electrical power than any other aquaponics system in the world and can be solar or wind powered.

  • Portable Farms® provide table vegetables (greens and blooming plants such as tomatoes, peppers, etc.) and fish (tilapia) as a protein source to maintain optimal health.

  • Three people can operate one-quarter of an acre of Portable Farms® which feeds 240 people forever. Twelve people can operate one acre of Portable Farms® which feeds 1,000 people forever.

  • Portable Farms® can be operated by semi-skilled labor and people of almost any age (young and old).

  • Greens grown in Portable Farms® can be harvested in as few as 28 days after installation and continue producing forever .

  • Portable Farms® feed families, communities, cities, countries and the world.

If video is not visible, please UNBLOCK your browser to allow YouTube to play.

Phyllis Davis was awarded Second Prize after presenting Portable Farms® Aquaponics Systems to the San Diego Inventors Forum’s Annual Inventors Contest. View 8-minute presentation on YouTube video above (viewed almost 29,500).


pretty cow2

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Skip to comment form

  1. Robert M

    I live in Pensacola Florida and plan to retire soon. Starting a small commercial aquaponic system seems to be something I’d like doing during my retirement years. How much land and investment capital do I need to clear $100,000 Annually?

    Also, Tilapia isn’t allowed in the panhandle section of Florida for some reason unless you can get a special permit from the state and I’m sure that won’t be easy. Therefore what fish type should I use for my area. Thank you for your time and looking forward to seeing what you folks can offer.


    1. portfarms

      Second item first, check with Florida Fish and Wildlife. You do not need a permit for blue tilapia in Florida, the hybrid you will need a permit.

      The Commercial Aquaponics GOLD ebook covers all of the information on sizing, marketing and being successful in aquaponics. Rough figures, excluding land cost, for an income of US$100,000 will be in the range of US$250,000 to US$320,000. The ROI, Return on Investment is approximately 3 to 5 years, this assumes you are hiring all of your labor. If you and your family are the labor then the ROI is closer to 2 years.

      We trust this information is helpful.


  2. Gregor Sidler

    Dear Ms Davis
    I just bought your book…. AQUAPONICS GOLD© and I can’t quit reading it. Any ideas how I get away from the computer? 🙂 I mean it.
    As I begun my journey to build my first Aquaponics system several months ago….at the end of the day I always come back to your site. The book is great. The 17 secrets might look not much when you read it at first but I think those are some of the essential parts of understanding the aquaponic system.
    Thank you so much for your “legwork” and dedication for the past 40 plus years.
    Gregor Sidler

    1. portfarms


      Thank you for the kind words! May I suggest you print out Aquaponics Gold and place it in a binder. Most of our Aquaponics University students do exactly that with the Aquaponics University Course so they can refer to the information easily.

      Congratulations to you on building your own aquaponics system. We call it getting your hands wet and it is THE best way to learn about the amazing technology first hand.

      We also have two more books coming out, Commercial Aquaponics Gold and Backyard Aquaponics Gold. We’ll post the announcements on the website soon.

      The best of luck to you.

      Phyllis Davis

  3. Cheryl

    Mrs. Davis,

    Do you currently have a facility we can visit? If so, please advise so we may schedule a visit accordingly.

    Continued success.

    1. portfarms


      Yes, the information on Tours is on the website.

      We look forward to seeing you.

      Colle Davis – Inventor

  4. Sharonne Jaeger

    Hi Phyllis,

    I’ve been researching aquaponics for awhile to start supplementing my retirement in the near future and came across your site on Pinterest. Congratulations on your Inventers award and was WOWED by your speech.

    Thank You
    Sharonne Jaeger

    1. portfarms

      Thank you Sharonne! I appreciate your kind words. We have 450 pages on our website so start researching and learn about aquaponics.- Phyllis Davis – Co-Inventor, Portable Farms Aquaponics Systems

  5. Radi

    i’m from Indonesia (far-far-far a way country)

    my only question :
    did you ever have sent portable farm module to Indonesia?
    how much your costumers from Indonesia?

    and what should i do first if i wan to have one module of your lovely portable farm


    1. portfarms


      Everywhere in the world is close today. We have students in 10 countries and yes, we have students in SE Asia. You will have to satisfactorily complete the Aquaponics University Portable Farms Aquaponics Systems Course© before we can ship you the PFAS Kit. The contents of the PFAS Kit is listed in the PRICE LIST available on every page, top right, of the website.

      We look forward to having you as a student.

      Colle Davis – Inventor

  6. Dennis

    Hi Colle,

    2 questions…
    Are there any PF customer testimonials that I could review?
    Is there any data available detailing the nutrient contents of various vegetables grown in the PF environment?

    Thank you.

    Dennis Pitt

    1. portfarms

      Here is a link to a testimonial from our country license holder in Botswana Africa: http://portablefarms.com/2013/endorsement-for-portable-farms-from-the-country-license-holder-in-botswana-africa/

      We do not conduct studies for nutrient content in our plants. We supply them with 57 organic trace elements in our FF Mineral Rock Dust aside from the fish waste nutrients and the ‘taste’ of the food is excellent.

      Phyllis Davis
      President, PFAS LLC

  7. jojo ma.coll

    Dear Mam/Sir,

    I’m filipino, a technician working at Saudi Arabia. I’ve a 2 lots in the Philippines, one , sizes 1300 sq/meters, and the other one is 2400 sq./meters. I want to maximize my land with aquaponics to support my family (5 persons) and gainsome money . I just want to know much capital I need to corresponse to my lot area so that I can save. And where to I start ? Do your courses are online?
    I hope you could help me regarding this matter thank you.

    sincerely yours,


    1. portfarms


      The area required to feed 5 people is only 12m2. This means that your plots can be utilized for commercial installations which usually start at approximately 1,000m2. A commercial installation of 1,000m2 including the land preparation, building, materials and the Portable Farms® Aquaponics Systems technology but NOT the land cost (you already have the land) will be approximately US$280,000 to US$300,000 and will feed 240 people. The ROI (Return on Investment) in most markets is 3 to 5 years. This means a payback of the original investment in 3 to 5 years. The income from a well run commercial PFAS installation is between US$80,000 and US$100,000 the first year and increases approximately 15 to 20% each year as the Operators and the installation become more efficient and the markets increase.

      We trust this information is of help and we look forward to having you as a student. The AU Course is an email correspondences course and we have students all over the world.

      Colle Davis – Inventor

  8. donald

    Hi, I need help! I’m trying to build an Aquaponic Garden & here’s what I have & some things I’m looking for to
    which I hope you can help me out::: I already have 2/ 275 gal. food grade totes. Will start with 1 for fish. I also
    have 6/ 55 gal food grade barrels & 4 of them are CUT in 1/2-Longways. What I need from you, if you offer it
    is the proper “Pumps” to cycle water thru my system. I’ll also need some fittings & valves. I need an air pump
    to oxygenate the fish water(just to make sure they are kept well! And I may need some type of heater for the
    winter here in north Texas! I just hope you have some pumps & parts to get me set up. I saw some other
    worm items & I think some filter ideas that will be good for a “Clean system”!

    I do hope you can help me. Sincerely,

    Donald Goodin

    1. portfarms


      If you want to use a cobbled together system you need to follow some other system besides Portable Farms® Aquaponics Systems. There are literally millions of references on the Internet that will show you how to put together a homemade system. The Portable Farms® Aquaponics Systems for small and backyard installations is only available by taking the Aquaponics University Portable Farms Aquaponics Systems Course© where we teach you how to build a system in a climatically adapted structure and operate it successfully.

      Good luck in all of your endeavors.

      Colle Davis – Inventor

  9. Vinit

    Hi …

    I want to know that how much Investment I will have to do.

    Assume I have 10000 Sq.ft land.


    1. portfarms


      There is a process we have designed to help you arrive at the amount of investment for your particular project:

      To better assess your project and offer answers that are timely and relevant to YOUR unique situation, please answer the following general questions related to your project and we’ll get back to you ASAP. Some of the questions may be redundant, answer them anyway.

      1. What size project is your group planning to build? ¼ acre? 1 acre? Etc.
      2. What state, country or territory is your project targeted for installation?
      3. What is your projected time frame to begin your project? 90 days? One year? Etc.
      4. What project of this size, in any arena, has your group accomplished in the recent past? In other words, can your group actually build this installation?
      5. Is your funding in place? That means your group could pay cash for the entire installation TODAY. If not, do you have a target date for that available funding for the project?
      6. Have you explored the marketing study for selling the food Portable Farms is capable of growing? This means, you have actually talked the chefs, food managers and buyers and have solid commitments from them to buy the production from your installation.

      After completing the above responses, please return them to me and I’ll send you the 5 Phases information.

      Colle Davis – Inventor

  10. Raul

    Hello: I would like to ask you if your system has been tested with Ornamental fish. Also if you have info about your system with big cat fish or Arapaima. Thanks in advance.

    1. portfarms


      We have had clients grow goldfish and koi very successfully. Catfish do extremely well in the Portable Farms® Aquaponics Systems.

      Colle Davis – Inventor

  11. J-N Turcotte

    What would you suggest for an hobbiest in Canada (Montreal temperatures).

    Type of fish and food ?
    And mostly, how should it be cooled and heated ? if it is possible.

    thank you

    1. portfarms


      The Portable Farms® Aquaponics Systems can be installed anywhere a climatically adapted structure is available. There are a growing number of PFAS installations in Canada. The fish we recommend is tilapia and most people feed them a commercial tilapia/catfish chow. They are herbivorous and can be trained to eat duckweed, lettuce, zucchini and other plant material, even coffee grounds.

      There are many ways to heat and cool the interior of the structure. One of the reason the Aquaponics University Portable Farms Aquaponics Systems Course© was developed was to insure success in virtually any climate by outlining the requirements of the plants and fish. Yes, it is possible and the PFAS owners in Canada are very happy with their installations.

      Colle Davis – Inventor

  12. iqbal singh

    Hi Colle ,
    Am really very interesting with this aquaponic system. I have 0,5 hectare mineral land in Indonesia.
    What is the most desired of average water temperature for tilapia or gouramy fish?
    Could you please give us the guidance for land preparation,installation,etc?
    Thank you so much.
    Iqbal Singh

    1. portfarms


      You need to spend more time on the website, the water temperature question is answered there. Use the SEARCH box, top right corner, to search for information on the site.

      For the Commercial aspect please send the answers to the 6 questions on the Commercial page and the Front page and we can get you started.

      Colle Davis – Inventor

  13. Savannah

    My name is Savannah and I am an 8th grader at Clinton Middle School. We have our own aquaponics system but it doesn’t seem to be working that great. Last year we bought 50 goldfish and 49 of them died in 14 days. We think it is the PH levels.Here are some notes that might help. After evaporation of chlorine from tap water, pH rises from about 7.5 to 9.0. pH optimum: 7-8
    Adjusted pH with vinegar to 7.2. Within 4 hours pH increases to 8.0 and then within 24 hours 9.0.
    Britta Filter lowered pH to 6.0. Within 4 hours at 7.5 and 24 hours 8.8.
    Reverse osmosis, ph 7 → 8.8 (24 hrs) Water that has been forced through a special membrane under pressure. It is a slow process that produces virtually pure water. This water requires remineralizing with essential elements before use in aquarium, but will be free of phosphates, nitrates and other nasty chemicals.
    Kenosha water pH 7.5 . Sealed stayed
    Room 4 – 8.8 after about 1 week
    Aquaponics Lab – 8.8 -9 in 24 hrs.
    Testing with and without gravel had no effect.
    We were wondering if you could maybe help us. Please let me know asap if you have any information on how to help us. Thank you!

    1. portfarms


      You teacher asked the same question. Use a product called pH Down to reduce the pH in your system. You way have to check it every day for a while. Do not use RO water. Use tap water, let it sit for a full day or put in Vitamin C 5mg per gallon to take out the chlorine. Without fish the pH will go up to the level in the water use and the above as evaporation pushes it up. That’s the best I can do for you because I have no idea how much water is in your system, what the turn over rate is and what plants you are using.

      Colle Davis – Inventor.

  14. Richard Wood

    I also live in Central New York. I have two questions: 1) I’m assuming that the water for the fish has to be heated in the winter. How much does that mass of warm 70 degree (+ or-) water contribute to the warming of the air in the greenhouse? 2) What is the rationale behind using a gravel type growing medium rather than the channels that are so common with commercially available systems?


    1. portfarms


      The fish tanks are insulated and so the water is only exposed to the gravel, not the air, in the space. The warm gravel does contribute to the temperature, but not as much as one would expect. The plants love the warm, nutrient laden water on their roots.

      We have had fantastic results with the gravel medium filled Grow Trays and our system is used to treat the water, the channels are not performing that function.

      I trust this helps in some way.

      Colle Davis – Inventor

  15. Neil

    We have an 1860s farmhouse in Central New York State… Building a climate controlled greenhouse for NY is a little cost prohibitive for us, but we have a completely unused basement that only houses our furnace and hot water heater. (approx 750sf) However, being an old farmhouse, the basement tends to be damp, has a dirt floor, and may prove challenging to keep “bug free”. Also, from time to time (once or twice a year), heavy enduring rains can result in a few inches of water in it as well. Is it conceivable that an aquaponics system could survive in such a space? It would be nice to finally find a use for the basement.



    1. portfarms


      Having been raised in Central New York, I understand exactly what you are facing. Two suggestions to implement, IF you want to use the space for a Portable Farms® Aquaponics Systems. 1) Put in a sump pump with a float valve in a sump hole. 2) Pour a concrete slab across the entire space to keep it cleaner.

      The PFAS Modules are 36″ off the ground so they will not be bother by the moisture, but the space will have to have venting to the outside or upstairs to keep the moisture in the basement at a reasonable level. In the winter, open the basement door and have a fan

        blowing up the stairs

      . In the summer have a window fan SUCKING the air out of the basement.

      Good luck. You need to take the AU Course first.

      Colle Davis – Inventor

  16. Joy

    Hi do you have any reps in Australia?

    1. portfarms


      Not currently. We do have a system is place for local retail sales, BUT more resembles the selling of software with hardware, a bit like computers. We are publishing an article this week on ‘Distributorship for Portable Farms®’ that will be helpful. It is a serious investment and requires a construction company either as the primary or as a partner in the venture. Stay tuned.

      Colle Davis – Inventor

  17. Rhonda Trull

    I live in southeastern Georgia. We rarely drop below freezing. Is it necessary to have a greenhouse for an aquaponics system in the southern regions of the U.S.?

    1. portfarms


      You need a climatically adapted structure everywhere and in Georgia it is mostly to keep the rain off and the bugs out.

      Colle Davis – Inventor

  18. Alan


    Do you have any systems that you have set up or supplied in the UK please? I would love to have a look at a working model but wont be in San Diego for a little while (unfortunately!)



    1. portfarms


      Currently there are no publicly accessible PFAS installations in the UK. There are several projects ‘in the works’ as they say, but none open to the public yet. When the first ones are available, we will announce them in our newsletter and on our website and they will become rock star attractions because we receive so much traffic from the UK to our websites.


      Colle Davis – Inventor

  19. Clare

    Good Afternoon,

    I am currently a year 12 student at Brighton Secondary School and planning to base my Research Project within Brighton Primary School’s Produce Garden.

    I have been given the opportunity to manage an aquaculture system for Brighton Primary School’s Produce Garden. The project will involve researching, designing and organising a commercial grade aquaculture/aquaponic system. This project is for students to be educated in the science and business of cultivating marine or freshwater food, which may include varieties of fish or shellfish. This is not only an important part of my schooling, but also a valuable project within BPS.

    What type of aquaponic system design would you think would best suit an indoor area that young students could observe or be involved with, and why??

    1. portfarms


      There are literally millions of pages of information on the Internet about aquaculture and aquaponics. You will have to choose the system best suited for your specific needs and outcomes. A commercial Portable Farms Aquaponics System is not a teaching tool, it is a high intensity food production facility. Start small with fish tanks, grow lights and grow beds and see how the systems work in your indoor facility.

      I trust this information is of help to you in some way.

      Colle Davis – Inventor

  20. Bryan Isanoa

    Good Morning

    First, i’m not speak english, i’m from Colombia, and i admire all what you can make with aquaponics system, i’m really surprised with the food’s quality, beauty and scale. I would like to take aquaponics practice. Pitifully in this country i don’t find out some informatión or way to start it, there’s not so much information. thanks for attention and sorry for my limited English.

    1. portfarms


      Thank you for your nice note. As long as you can read and write English you will do fine in the Aquaponics University Course. My Spanish is not so good either unless I have a couple of beers.

      Colle Davis – Inventor

  21. Peter

    looking into the feasibility of this style of thing in Thailand, initially on a backyard basis

    1. portfarms


      Then take the Aquaponics University Portable Farms Aquaponics Systems Course© and you’ll be ready anywhere.

      Colle Davis – Inventor

  22. John


    Do I have really have to give my information just to get the pricelist? Any other way of getting it?



    1. portfarms


      The request for a Price List is a business transaction. You fill in the form, we send you the link, put you on our mailing list and you can immediately unsubscribe when your receive the first of the really well done newsletters. Your website has the same arrangement so what about our request bothers you? It is the way online business is done.

      Colle Davis – Inventor

  23. Jahangir

    Hei……..just wanted to se your pricelist …f ex 5_fases of comercial growing

    Thanks Jahangir

    1. portfarms


      Every page has a FREE PRICE LIST sign up. Right hand column, second box. Fill in your email address and first name, click SUBMIT and VOILA, up pops the price list. The 5 Phases request also has an email request form you can use, please do so.

      Colle Davis – Investor

  24. Andrew

    Hello my name is Andrew, I am a college student and was looking at you’re product and I work for a restaurant and they wanted me to build a aquaponics system for them, and eventually grow to selling capacity if we were do that would we be allowed since you have a patent pending?

    1. portfarms


      The patented system does not prevent you from selling the food. It prevents you from duplicating or teaching our technology to others. Which system do you plan to build. The Aquaponics University Portable Farms Aquaponics Systems Course© is the best place to start the process.

      Good luck in your endeavors.

      Colle Davis – Inventor

  25. sue ann richards

    Are all the material used in your system chemical free? Most sites say to use plastic pipe and plastic totes for the aquaponics, but most plastics give off harmful chemicals that I don’t want to get into my plants or fish. I would also like to know what the price would be for two of your units, one to feed three people and one that would feed twenty people? I live in Alaska so the thought of having healthy food year round is very appealing to me! Thanks for your time and your inspiration! Sue Ann Richards

    1. portfarms

      Sue Ann,

      Nothing is chemical free. This system is probably not for you. It uses PVC pipes, plastic fish tanks and plastic liner so you could not eat the output anyway. The figures on output are on the website and to buy two will require you taking the Aquaponics University Portable Farms Aquaponics Systems Course©.

      Colle Davis – Inventor

  26. Tarun Hindocha

    Dear Colle,

    I have a green house measuring 500 sq.meters and would like to try aquaponics in about 250 sq. meters. After having tried it out and if successful, I would like to expand it in the entire 500 sq. meter polyhouse.

    I would appreciate your giving me an idea of what I can begin with and how much investment I would have to make in the first phase (250 sq. meters) if I bought the entire system from you.

    I look forward to hear from you soon. With regards,


    1. portfarms


      Thank you for your inquiry. I have sent you the 5-Phases of Commercial Growing .pdf in a separate email that will be extremely helpful in planning your project. We do not sell entire systems, only the technology. You will be well served to take the Aquaponics University Course also.

      Colle Davis – Inventor

  27. Coby

    Hello, I suppose salmon is out of the question for me, but I was wondering if you could grow another type of fish other than salmon, tilapia and catfish, if so what kinds of fish would you suggest?

    Thank You,


    1. portfarms


      The fish that are the easiest and least expensive to raise are freshwater, warm water herbivores. Carnivores require animal protein to grow well. Some fish food formulations are now available for them, but we are not familiar with their cost or effectiveness. Perch is a growing favorite, but require animal protein which is mostly in the form of ocean fish ground up and powered, contributing to over harvesting of the oceans. Tilapia are very easy to raise, are readily available, taste great and have a standing market.

      This may not be what you wanted to hear if your favorite fish was not mentioned, but that is the state of the industry today.

      Colle Davis, Inventor

  28. Pankaj

    I am planing to go Aquaponics way from conventional farming. Before I plan to move in this direction I wanted to know what is the ratio of land utilization comparing conventional farming vs Aquaponics. I have 2 acres of land which i want to use for this.

    1. portfarms


      It is very hard to move from conventional farming to aquaponics because they are so different. Interestingly, we have never, knowingly, sold a PFAS Unit to a farmer. They are not interested in the technology. The ratio of utilization of land is not an accurate way to compare them. Very few farming methods can yield nearly 80,000 lbs (35,000 kilos) of tomatoes per year from 10,000 sq ft (1,000m2). You do not need much land, or much water, or much electrical power, only someone to plant and harvest the vegetables and feed and harvest the fish.

      Colle Davis, Inventor

  29. David

    Hi, been reading alot about your systems, what kind of cooling do you use for growing salmon? I’ve been searching the internet for pictures of your systems and talking to people but as far as i can tell there is nothing…? alot of people are intrested in this kind of system and growing salmon but they all say it’s impossible to grow salmon and make profit, the adult fish need salt water and this would be no good for aquaponics… I’m thinking of building my own system with hot and cold tank and some kind of heat exchange to minimise the running cost


    your welcome to have a look at my page in the forum, I’m sure if you have a working system alot of people there will be intrested!

    thanks Dave

    1. portfarms


      Thank you for your inquiry into the feasibility of salmon aquaponics. For backyard or small installation, as another person in the forum pointed out, if there is no profit it, then it is only a hobby. In the case of salmon aquaponics it is not financially viable and will simply be a fun and frustrating hobby.

      For commercial operations the key is to figure out an economic way to COOL the water. In northern latitudes in is MUCH EASIER to cool water than is hot climates. When we receive inquiries from locations such as Dubai or Nigeria or Haiti we carefully point out that heating the water and the space is almost never a issue, it is the cooling that requires the big bucks. We express a similar sentiment for people in Northern Canada, Finland and Alaska that they need to have a relatively inexpensive source of energy to insure enough heat if they are using tilapia or catfish. In the cool climates retaining the heat in the water is easier because they can use insulated tanks.

      When we are approached by a company serious about a commercial salmon aquaponics installation in a cool climate we show them exactly what is involved and how much it will cost. These installations start in the US$250,000 and up range. There is not enough money in the backyard or hobby arena of salmon aquaponics for anyone to make a profit and Portable Farms LTD is in business to make money.

      I trust this addresses what you were asking of us.

      Colle Davis, Inventor, Portable Farmsâ„¢ Aquaponics Systems

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