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Thread: mixing different bleach strengths?

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    JayG's Avatar
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    mixing different bleach strengths?

    Hi,

    I asked this question in my "bulk bleach storage" post, but I remembered that new questions are best asked in a new thread. So, my question is whether if I already have 12.5% in a tank, can one safely add 8.25% as long as one adjusts the dosing for the resulting combined dose? Not something I would plan to do, but if I already had one type and couldn't find the same strength, is there any harm in mixing? My gut says "no", but I thought I'd check.

    Many Thanks,

    Jay
    Jay--Metro NYC
    35K gal, in-ground, free-form, pebble finish, 2 skimmers, 3 returns, autofill. No spa, no features. Partial shade.
    Pentair C&C cartridge filter (400 sq in), Pentair VS pump, Pentair 140 btu heat pump, Triton Plus Robo-cleaner; Stenner with 55 gal bleach cistern. TFT 100 test kit.

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    Patrick_B's Avatar
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    Re: mixing different bleach strengths?

    No, mixing 8 bleach and 12 bleach will only dilute the mix.
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    JoyfulNoise's Avatar
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    Re: mixing different bleach strengths?

    No harm/no foul! You're all good.
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    JayG's Avatar
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    Re: mixing different bleach strengths?

    Thanks for the quick replies. Sometimes one's gut response is on point, but other times (like mixing tri-chlor and cal-hypo) are less obvious.

    Good to know.

    Jay
    Jay--Metro NYC
    35K gal, in-ground, free-form, pebble finish, 2 skimmers, 3 returns, autofill. No spa, no features. Partial shade.
    Pentair C&C cartridge filter (400 sq in), Pentair VS pump, Pentair 140 btu heat pump, Triton Plus Robo-cleaner; Stenner with 55 gal bleach cistern. TFT 100 test kit.

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    Patrick_B's Avatar
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    Re: mixing different bleach strengths?

    It's a very prudent question to ask anytime you're mixing chemicals. Better to ask than have a problem.
    TFP Moderator
    Essential Links:
    ABC's Of Pool Chemistry, Test Kits, SLAM Your Pool
    28K Gal IG FreeForm, CLI Quartz, Pentair 36"SF & VS Pump, Dolphin M5, Rheem

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