August 15, 2013
This 10 by 12 foot greenhouse is home to our food production machine for tilapia, fresh veggies, and fruit.
It is currently cycling ammonia in the system to establish bacteria among the rocks/clay media. I used lava rock for the bottom of the grow media and PlantIt for the top. Lava rock is great as a grow media, but isn’t very easy on the hands. PlantIt is lightweight and a great product however it is expensive. Laying the two media types helped cut down on the costs.
Fish waste water is pumped from a sump tank into the 3 grow beds where the bacteria converts it to nutrients that the plants can consume. The water is essentially filtered by the plants and drains back into the fish tank.
Some of you may remember the Duckweed I started growing several months ago in preparation for this. The Duckweed will be fed to the tilapia as it reproduces faster than they can consume it.