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I'm running my two speed Hayward 1.5hp pump on low speed 24/7. About every two to three weeks, despite no visible rise in the roughly 5psi filter pressure drop reading, the flow falls off to effectively nothing. If I then put the pump on high speed, I get good flow again. Once I backwash the...

I'm thinking about running a new return by the steps in my 15'x30' above ground oval. The existing Pentair Light/Return Combo doesn't appear to be giving me the flow and circulation I'm looking for unless I run my 1-1/2hp Hayward two speed pump on high. Even then I'm suspecting some leakage...