I'm thinking of doing the same thing myself in my backyard water garden in West Houston. It takes up most of the backyard with 3500 gallons and up to 4 feet of water. It's fully filtered and has two major falls that move 3000 gallons and hour. I've been able to keep the temperture up on cold spells by adding water treated for chlorine. Any ideas if a fish farm can ship Talapia by overnight in bags? I did get 60 lbs. from Tod Overton for my pond but neglected to keep a few out.
