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    Pentair Quad DE Incompatible with salt-water?

    I've been running my pool for two years now with a SWCG (as a deactivated SWCG was present when I bought the house). I just noticed on the filter label that it's "Freshwater Only", but I can't find any information on that requirement online and can't think of why that might be. Any clues...
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    How to power/interlock Circupool Universal40 from IntelliFlo VSF?

    I picked up a Circupool SWG, without realising that the built-in flow switch was insufficient to safely control the SWG. What's the typical approach here for someone who doesn't have an automation controller? Is it possible to tap a signal off the pump? Is a timer sufficient? Any recommended...
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    How long to see TA reduction when treating with muriatic acid?

    Current chemistry: FC: 3ppm-8ppm pH: seems to be rising pretty quickly, takes maybe 1wk to rise from 7.3 to 8.0 TA: 160ppm (I'm dropping pH to ~7.0 periodically with muriatic acid to try and reign this in, but haven't seen much change in the two cycles I've done so far) CH: 260ppm (I am...
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    Reinstating a disabled SWG system - which unit, and can the old cell be retained?

    The previous owner of my pool (in sig) had a SWG system in place, but appears to have disabled it at some point. Pictured below are all remaining components of the system. If I understand correctly, I'd need at least a controller, and most likely a new cell as well. Are there any go-to...
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    Newbie with yellow/black mold, stratospheric CYA.

    Hey y'all, glad to join the party! We've just bought our first house with a pool and are trying to get our bearings. FC: 3ppm CC: 0.5ppm pH: 7.7 TA: 135ppm CH: 300ppm CYA: 200ppm after proper testing ... 210ppm? See pic, below Water looks crystal clear to slightly cloudy, depending on the...