Hi there, I'm new to the group, but just put in a permit request for yellow perch.  I'm excited, and can't wait to have a fish fry next year. Anyhow, I tend to cycle different kinds of fish through my system in summer and winter, and vary the temperature a lot.  I've noticed, for example, that catfish grow great above 75, but slow down below that and stop eating at 50.   Does anyone here have a s…