i bet that sucker heats up in the summer too.....trout more then likely wont survive....and id say its already overstocked and will stunt the growth of the fish.....my friends pond was about an acre or so probably a little less......and we never took any out....and they constantly reproduced nicely......bass and gills......but the gills all stayed small and the bass didnt get big......we took some gills out and they all grew....but then beavers came in and flooded the pond and it killed everything........no more pond......i think they quit working and the damn broke and the pond is probably just a crater or a mud hole now...........too bad......good luck....maybe find a friend with machines that can dig you a bigger pond or something....but id say you have too much in there already