I recently purchased a home that was previously owned by a pool builder. He built a show pool (which was part of the reason we bought the home) It is huge. It has two Pentair Whisperflow 2.0G 1.30 pumps (only one seems to be working- the other sounds like the bearings are going out and it leaks at the seal between the motor and the pump when it kicks on and off) There are 2 sand filters. It has two working water falls. I am looking for a more efficient system both on the pool and especially the light bill. I would assume there are much better ways to maintain my pool. I thank all of you in advance for your advice. My main concern first, is replacing the pumps and/or filter system or going to one pump etc. The previous owner said the second pump was just a back up. I will try to post pix of the pool and pumps. Thank you again.