Worm Casting for Aquaponics

FF Portable Farms® Worm Casting Tea – The Quick and Easy Method  
Brought to you by PFAS LLC, Inventors of Portable Farms® Aquaponics Systems
https://portablefarms.com 804-367-3752    pdavis@portablefarms.com

 CLICK HERE to learn about Mineral Rock Dust.  Both Worm Castings or Mineral Rock Dust have been shipped to Portable Farms® customers in ALL 50 US STATES!  

Find the Order Form at Bottom of this Page.

We suggest you purchase a simple sprayer to apply your worm castings tea to your plants and spray the plants in your aquaponics system once a week with Worm Casting Tea to create healthier plants. There are tremendous benefits from the foliar application of Worm Casting Tea in your aquaponics system:



  • Safe for your fish (a very big advantage).
  • Our FF (Fish Friendly) Organic Worm Castings are pure organic worm castings and not vermi-compost.
  • This worm casting tea is non-toxic to plants, fish, pets, or people.
  • By spraying the worm tea on your plants (under the leaves as well as on top) and over your seed trays (seed nursery), you are adding nutrients directly to your growing plants and making them healthier and minimizing any potential problems.
  • Since you are spraying the leaves and fruit/vegetables, pathogens are less likely to attack your plants because you are adding beneficial microbes (very important to healthy plant growth) to the surface of the plants.
  • Worm casting tea is beneficial and controls many fugal problems like black spot, black mildew, and tomato blight, to mention a few.
  • Testing proves that there are microorganism properties in the worm casting tea that act as an insect repellent for many insects such as aphids, white fly, spider mites, and other small bugs that eat plant juices. This is due to enzyme released in the worm tea called chitinase which will dissolve chitin which is the exoskeleton of an insect.


The FF (Fish Friendly) Worm Casting Tea method works much faster than standard methods and produces tea of equal or better quality. You can make your Worm-Castings Tea in as little as 4 hours and 98% of that time is allowing the tea to brew or sit and brew prior to application in your aquaponics system. Easy to make. Easy to spray. Great for your aquaponics system.

For an aquaponic system with 200 sq. ft. of grow space, use one cup of FF Worm Casting Tea. You only need 10 cups of fish-friendly water from fish tank or aquarium to make the tea and apply it on the same day. 

Adjust amounts for your grow tray size. The Portable Farms® Worm Casting Tea Method makes two assumptions:

  1. You have an aquarium or fish tank water or water that has been in an open container for overnight.
  2. Here is a quick and complete way to remove chlorine from water – Vitamin C (only plain water-soluble ascorbic acid with no fancy additives such as Citrus Bioflavonoids or Rose Hips, etc.) at the rate of 1 mg per gallon of water. We picked up this trick for curing water from our work in Portable Farms®.


Ingredients and equipment:

  • 1 cup FF Worm Castings which is 100% organic and supplies a natural source of nitrogen, phosphorus, potassium, calcium, and iron for your plants.
  • 10 cups of water from your aquarium or your fish tank. Use tap water only when it has been treated with Vitamin C to remove the chlorine.
  • A bucket that holds 14 cups of water (make sure the bucket has had no chemicals in it in prior usages).
  • Let a kitchen blender to do the work to mix and aerate the worm casting tea.
  • Use a wire mesh strainer (mesh strainer works better than a spaghetti colander) or a cloth (cheese cloth or old hosiery) to line the strainer (the tea must pass through your sprayers nozzle so make sure the filter is smaller than the particles in the brewed tea, so strain well). If the worm casting tea is not well strained, it will clog up your sprayer



  1. Pour four to five cups of water which has been taken from your total of 10 cups into a kitchen blender (this process is tough on blenders, so it is best to buy a cheap one to use only for this type of work) and put the lid on before you blend.
  2. Turn on the blender and let it run for about a minute at a relatively high speed to entrain air into the water oxygenating it.
  3. Remove the lid and then carefully add the one cup of FF Portable Farms® Worm Castings.
  4. Put back the lid back on the blender and run it at full speed for one to two minutes, turn off and then let the mixture sit for 2-4 hours in the blender.
  5. Set up the strainer with the cloth liner to drain into the large bucket with the rest of the water.
  6. Very slowly and carefully pour the mixture through the strainer/cloth into the bucket with the remaining water. The drainage gets slower and slower so you may want to stop and change filters to speed up the process.
  7. Stop pouring when the heavier remains start to flow out of the blender.
  8. Stir the worm casting tea thoroughly.
  9. Pour the resulting liquid into sprayer. Note, the color of the Worm Casting Tea can be VERY black.
  10. Now you can spray your plants on the top and underside of leaves.
  11. Use all the mixture within a day. It may start to ferment if you leave it in the sprayer longer than one day.
  12. BIG BENEFIT: FF Worm Casting Tea can be made in HOURS not days!

Note: Use the remaining casting residue left in the strainer cloth and blender on your indoor or outdoor plants, or your yard, at the base of a plant or tree. DO NOT PUT LEFT-OVER WORM CASTING RESIDUE INTO IN YOUR AQUAPONICS GROW TRAY.

Very Beneficial Additional Ingredients:You can add The FF Portable Farms® Mineral Rock Dust at the rate of one teaspoon per batch at the time you add the Worm Castings, now you have a great Mineralized Worm Casting Tea.  This FF Portable Farms® mineralized Worm Castings Tea is quick, elegant, the perfect nutrient foliar spray, and a strong insect spray for the plants. It is fast and easy to make and is applied the same day.

This is one more product and service from Portable Farms® to encourage successful growing in the field of aquaponics.


Product Name



FF – Worm Casting 105 FF Worm Casting 5 lbs
$16.50 plus $14.25 Shipping and Handling = $30.75. 

FF – Worm Casting 110 </td FF Worm Casting 10 lbs $26.22 plus $17.00 shipping and handling = $40.32.

FF – Worm Casting 140 FF Worm Casting 40 lbs

$39.50 Please email us your zip code to determine shipping charges to your location from Southern California.

FF – Worm Casting 2000 FF Worm Casting

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

Please email us your zip code to determine shipping charges to your location from Southern California.

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