Chinese Perch tend to like it on the cooler side. 80F will be fine as well, but they I had one that I kept at 80F-82F. I found out that they do better in cooler temperature so I removed my heater which lowered it to 75F-78F and it was more active. It's appetite was always voracious regardless. I never got it off live feeders. It's one of the hardest fish I've ever tried getting off live food.