I have a small 12 x 16 fiberglass, 5,500 gallon pool. I use a Jacuzzi JC 150 cartridge filter and just had to replace a 4 year old Pentair 1.5 HP variable speed pump. Shame on you Pentair! So, I recently purchased the Jacuzzi 1.65HP variable speed pump. I use a Rola Chem pump to add liquid chlorine into the pool. So far I am completely satisfied and hope the pump lasts more than 4 years.