There are 2 commercial growers, one North and one South , about an hour or so drive from me.
One guy is using 8' X18" deep kiddie pools to grow them in.
David, you mentioned 2 commercial growers. I know about the one just South of Green Cove Springs....where is the other one? By the way, I don't know if you saw him on the TV News there or not, but the one just South of GCP made the news in Jacksonville. His entire crop of Tilapia was wiped out (he had the outside in ponds) and he was coming close to loosing the Red Claw because of low temperatures. It showed the inside of his operation on TV where he keeps the Red Claw and as best as I could tell, he had shade cloth on the sides of the Greenhouse, not much for keeping out the cold