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    Low pressure after changing filters

    I recently changed my filter cartridges out and immediately noticed lower pressure at the filter. The pressures used to read about 10psi when “clean” and creep up from there. I was overdue to replace these so thought maybe the 5psi reading after competing the job would be my new “clean” psi. I...
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    pH Spiked, not sure why

    Came home today and tested to find a pH spike from 7.4 two days prior, where it had been consistently, to 8.0 tonight. 5:30pm: FC 3.5 CC 0 pH 8.0 TA 100 CH 370 CYA 85 (I repeated the pH test on samples from multiple locations and cleaned all my equipment to make sure I wasn’t getting a...
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    Rehab advice? Lots of calcium and popoffs

    A few months ago we bought a new house and the pool had been very poorly cared for. I’ve gotten it pretty well stabilized and now thinking about best path to restore it. First big issue is that the plaster is bubbling and popping off on the first step. I haphazardly tried some underwater...
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    Cause of chlorine usage?

    Hi, I got a swamp with crazy calcium deposits in the backyard when I moved into my new house. Using this forum and Pool School I have been able to turn it around and keep it under control. Here are are the numbers from just before my shock tonight. FC - 3 CC - 0 pH - 7.4 TA - 90 CH - 300 CYA -...