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Thread: "chalky" residue on shell

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    Join Date
    Nov 2015
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    VT
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    "chalky" residue on shell

    I use softened water at fill up.
    I use bromide+bromine tabs and bleach per the sticky here.
    I use a Taylor test kit and maintain the water perfectly.
    I just did a drain/refill and noticed that, below the water line, the tub looks "chalky".
    What is it from and what's the best way to remove it? (it didn't come off with a sponge+Ahh-Some)
    The tub shell is a textured plastic, not a high-gloss acrylic.
    Hot Springs Sovereign (1999?)

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    Texas Splash's Avatar
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    Re: "chalky" residue on shell

    Brian, can you post a full set of test results please? That will be very helpful as we try to evaluate your situation. Thanks.
    FC
    CC
    CYA
    pH
    TA
    CH
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
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    Re: "chalky" residue on shell

    I don't have the exact #s handy but they are always kept at recommended levels.
    Hot Springs Sovereign (1999?)

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    Texas Splash's Avatar
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    Re: "chalky" residue on shell

    Typically when we hear of a chalky residue situation, we think of a potential calcium issue. But it's not always as easy as just getting a CH reading or assuming right away it's scale. Not that we don't trust your capabilities, but seeing all the results would be of great value. Just whenever you get a chance, try to post those for us so we can put everything into the poolmath calculator ourselves and compare.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
    If you enjoyed your TFP experience, please consider donating to Support TFP!

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