my uncle has a really lrg natural bottom pond that went to hell on him hes requested my assistance in getting it back in shape im estimating the pond is close to 50000 gallons. It got covered in algae this summer and all his fish died so hes wanting me to somehow build him a waterfalls off one of the banks to get some circulation and aereation going in it Ive been searching the web for a heavy duty pump that maybe runs on 220v but am having little luck in finding one that pumps much over 10000 gph do you think that would be enough for such a lrg pond any help or suggestions in accomplishing the task at hand will be appreciated