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    Unreliable PSI changes when adding DE to a sand filter

    Following advice in this thread I have added some DE to my sand filter to improve filtration. However, the resulting PSI changes are inconsistent so I'm wondering if something is off. Here's the data: Round 1 Filter was initially at 12.25 PSI Added 1/4 cup of DE at a time until filter reached...
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    Pool stubbornly cloudy after refill and SLAM

    Hi all, I'm new to TFP after having a frustrating time delegating water testing to a store and getting yellow algae. After reading TFP's articles and doing my own testing I realized my CYA was way to high (~120) and this was probably stopping my chlorine doing anything at all. Since following...