I was running 2 quietone 16000 pumps on my indoor 1500gal pond.... unfortunately somehow they both stopped working at the same time. One wont pump at all the other does for about 15min than turns off. So now I need new pumps. Id like to have at least 10k gal total flow so 5k each. It only needs to be able to deal with about 5ft of head height. I also dont want to be spending a ton of money. So preferably $250 or less a pump. Any help would be great, I have a few big cats who arent to happy about the lack of filtration.