I have a 20000 gallon IG pool with an old anthony apollo DE grid filter that is about 50 sqf. I have one skimmer and one return and the equipment is about 15 feet from the pool. My 1.5 uprated super pump has died and I need to replace it. I'd like to get something more efficient and not overpower my filter. I was thinking a 1hp northstar but I'm not sure....