What do you all know about yellow perch? I am sure they take longer to raise then talapia but I believe they are much more tolerant of the cold. What I could do is keep the water at ideal perch temps for 9 month of the year and focus on cold weather crops like spinach and Kale for the the coldest 3 months letting the water drop to the 50's or so. I am going to do some research on this and report back. The idea would be that if I can make a living off of the cold weather produce, The perch harvest every year and a half would be the bonus. Also, I was just reading that Talapia can reach market size 1.5lbs in 9 months. Is this true? Nine months of 75 degree water might not be to hard to maintain.