I finally gave up on trying to fix the pump and going with the pool store's advice and replacing the 7year old Hayward Tristar 2.5HP 2speed. My question is given the size of my pool 12-15k gallons and the spa overflow into pool feature, do I really need 2.5HP? They quoted me about $600 for the motor which seems pretty steep to the others I see out there. Also, a lot of people seem to advocate the 2speed motor but I normally run high speed only anyway given the cheaper electricity rates in houston. Will I be able to replace my current pump with one speed only? Here's a picture of the spa/pool. Unfortunately you will have to use your imagination because the pump is out. Thanks in advance for any input.