The sturgeon excrete ammonia through their gills and urea into the tank water. Bacteria break that down into nitrate, a plant fertilizer. The nutrient-rich water is then piped to the greenhouse and is filtered and taken up by the lettuce. The water returns back to the fish tanks much cleaner. It’s a closed loop system.
This aquaponics system allows us to recycle close to 80 percent of all the water we use—a great savings in this drought prone state of California.
Aquaponics systems allow food to be grown year-round and at high densities. It can be grown in urban areas, on rooftops, and on islands where fresh produce may not be available.