Hi Riverside;
I am in Sylmar, California. It is near LA. I just started building a small aquaponics, using 4" PVC pipes. I have a few question; I will be planting lettuce in the holes in the PVC pipe, but I do not know how big a hole should I make; and far apart should the holes be. Also I am having difficulty finding a hatchery or a place to buy tilapia and perch can you help me out?
Ambessa