We are almost finished building the greenhouse. It's only 6'x7' we are starting out small. I'm chomping at the bit to get started. I have a 20 gal. aquarium and a 55 gal rain barrel for fish. I live in Virginia  beach, virginia. And I was told at the fish store that Tilipa are not allowed in Virginia so I need some advice what fish should I use if I want to grow fish for food. Any suggestions???