I am getting quotes to re-surface/tile our pool and possible replace our pump for a variable speed pump. I have a STA-RITE 1.0 HP (S.F. HP 1.25) Max-E-Pro with a Pentair Clean & Clear cartridge filter, model CC150 I was told there are not many options on the market right now for pumps and my contractor says all he can find for me is a Hayward TriStar VS HP 1.85. I'm not sure if the change in HP is something I need or want. I read that HP isn't as important as GPM flow rate matching the filter. My filter is rated for 150 GMP. The Spec sheet of the pump tops out at 1130 GPM and at low RPM is about 38 GPM. On top of that my pool has a 1.5 inch line going to the pump now, then goes to 2 inch to the filter than back down to 1.5 for the return. This pump has 2" couplings. I guess I'm asking if I'm being sold a pump that will either not work with my filter and if that pump is appropriate to replace the one I have? Any help would be greatly appreciated.