Hello all. I have a one acre pond in NE Iowa that us currently 2 years old. I have stocked LMB, CC, and HBG. These are all doing very well. I hand feed and run a diffusion aerator 24/7. My family, friends, and I also like to swim in the pond. I have noticed some snails along the rocks as of late. I also have Giant Canada Geese that frequent the pond although I try to keep these off as much as possible. Wondering if I am too far north for stocking some red eared sunfish for snail control?