We have a one acre newer pond (3 Years old) that we have been trying to raise rainbow trout in. The bottom is 12 foot deep throughout the entire bottom. The first year we put 200 rainbows in the pond. We installed a decent size aerator with 2 diffusers and ran it 24/7. All the fish died in early June.
Last year, we planted trout again. The only differnce was that we only ran the aerator about 6 times a day for only 15-30 minutes each time. Even though the summer was hotter than the year before, and the fact that we lost 2 feet of depth to evaporation, the trout flourished all year just fine. It seems that with trout rearing, if you overaerate, it heats the water to much.
