I used a large swimming pool to raise catfish that I caught. I had them in the pool all winter and through the summer. They grew in there over the 2 years I had them. Most were over 5 pounds when I put them in the pool. The fish seem to do very well in there eating bugs that landed in there.I added several dozen large Crappies and bluegills that my friends and I caught over the summer.
I finally decided to get my pool back and replaced the liner. We ate all the fish at a fish fry. Make sure you have a good water pump running all the time during the summer.My pool was a 4 foot deep pool but I dug it down to 6 to 8 feet by using a special liner.