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Thread: Borates adding to Ca build-up at Tile Line?

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    Borates adding to Ca build-up at Tile Line?

    I borated a pool with Boric Acid a few months back, and now that the weather has warmed up, the tile-line several inches up has turned white. I've tried a mild acid/tile cleaner wash with minimal results.

    Any idea on why this happened?

    Thanks.

    - Jeff
    ~45Kg Pool with attached Spa, NSP-72 DE, Minmax 400 Heater, Tahoe Blue Pebbletech, Jandy SWG via Aqualink RS-8, The Pool Cleaner (black)
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    JasonLion's Avatar
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    Re: Borates adding to Ca build-up at Tile Line?

    An acid soap mixture almost always works. Perhaps you didn't use a strong enough acid. Try using one part 31% muriatic acid to ten parts of water and see if that does anything.

    I can't think of any reason this would have anything to do with borates. There is nearly aways some white scale depositing at the water line regardless of borates or not. You can minimize this by keeping the CSI slightly negative, but you can't eliminate it completely.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: Borates adding to Ca build-up at Tile Line?

    whats weird is in my notes there was a pretty clean tile-line in April. I added Borates in May, and within a week or so it got warm.

    Then, the tile "hazed" all of the way up to the coping, not just at the tile line. pH has been between 7.6-7.8, t/a at 80-100. I sprayed about a 1/8 mix of 31% with some tile soap added and it hardly made a dent.
    ~45Kg Pool with attached Spa, NSP-72 DE, Minmax 400 Heater, Tahoe Blue Pebbletech, Jandy SWG via Aqualink RS-8, The Pool Cleaner (black)
    Pumps: X3 Hybrid Pump (switches to SPA), 2HP Spa (additional, when SPA is on), and a 1HP For Waterfall
    8, 4x12 Solar Panels on the roof of the pool-house (~12' up)
    CAPTAIN JAMES T. KIRK: "I'M SORRY. I CAN'T HEAR YOU OVER THE SOUND OF HOW AWESOME I AM" (Thanks to TFP!)

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