Here are a couple diagrams I’ve sketched up while at work and on the bus.
It gets pretty cold here in Spokane, Washington and since I’m waiting to construct an outdoor AP system until I’ve built a passive solar greenhouse, I’ve been designing a system for our basement.
The first is a system with a flood tank up top that can be filled with duckweed and then fed to fish. There are two separate fish tanks that can house different size and species of fish. There is on O2 pump for both tanks, a sump pump in a separate sump tank that pumps up to the flood tank. There are 3 sets of lights, a high-intensity grow light over the lowest bed (for tomatoes), there is a 4′ long shoplight with 4 full-spectrum bulbs (for the salad greens), and a small bulb with 1 full spectrum grow bulb up top (over the flood tank with watercress and duckweed).
The second diagram illustrates a series of 3 fish tanks that connect to a fairly large sump tank (to hold crawfish) which then pumps to a small flood tank (for watercress and duckweed). The growbeds are actually 3″ wide PVC pipes that are 10′ long and could be set on an incline like a staircase to consume less space and still receive direct light. Salad greens would be planted and spaced out every 6-10″. The lighting used would be 4-4′ shoplights with full spectrum bulbs above.
