A few weeks ago I asked if my DE cartridge in my Sta rite PLD50 filter was causing low flow. I soaked the cartridge and ended up replacing the it (very expensive) and that wasn’t the problem. Still have low flow to sometimes no flow. There are no blockages. I’ve checked all lines and the impeller seems clear. The pool is almost clear so it’s not clogged from algae either but it can’t clear because the water isn’t circulating enough. I’ve been running the pump non stop for at least a month with this issue. My next thought is new pool pump since this one is from 2012. As long as I change it out for 1 hp which it has, any brand should work right? I’m afraid to spend another $300 on this if it isn’t the right way to go. I should of just bought a new filter instead of the cartridge