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    Does harness and phosphate matter at all ?

    I'm pretty sure this is an old topic that has been discussed many times... I get contradictory advice from different sources. I have a vinyl inground pool with a sand filter and no water heater, and my pool shop told me that I'd get algae if I don't reduce phosphates (currently over 2000 ppb)...
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    Main drain not working and pump pressure oscillating

    Hello, I am having troube (2 issues) with my swimming pool system. 1- My main drain is not working. I ran a shaft with a piece of thin rope attached to it to see if there was any succion at the bottom and there is none. Here is a picture of my pump and filter setup as well as my skimmer basket...