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    Rising CH and Scale

    My thanks to you all for your responses. I haven't yet checked the CH of my tap water, but here are the pool-water readings from my own testing this morning: FC: 1 (currently a bit low because of an issue with my SWG that I resolved only yesterday) CC: 0 pH: 7.4 TA: 80 CH: 450 CYA: didn't...
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    Rising CH and Scale

    Over the past year, I've had my local pool store test my water for CH. The CH level has been steadily rising (from 210, to 350, and most recently to 400), even though I haven't added any CH. Scale is starting to form on the tile. Can someone tell me what's causing the CH increase and if there's...
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    Pentair Intellichlor IC40 Flashing Salt Lights and Red Flow Light

    My IC40 SWG recently stopped producing chlorine. Even though the salt is within the proper range (~3200) and the flow is sufficient, the low/high salt lights are flashing, and the flow light is red. Every once in a while, without my changing anything, the lights all turn green and the unit...