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Thread: Hardened algae on intex liner

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    Hardened algae on intex liner

    We seem to have hardened algae(green) around the bottom edges of the liner. I have brushed it over and over and it just doesn't come loose. I rubbed it with my foot and it feels hardened..like rough and like it calcified to the liner? Can that happen if you don't brush it when it forms? We were lazy with the pool this summer since no one was really using it. The water is clear, I just can't scrub the algae off.
    Julie

    Atlantic Pool Products "Prestige" metal wall pool 18' x 48" round
    vinyl liner
    Hayward Power Flo pump
    Hayward Perflex DE Filter Model EC50AC

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    Mod Squad Bama Rambler's Avatar
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    Re: Hardened algae on intex liner

    Doesn't sound like algae to me. Can you provide us a full set of test results?
    pH
    FC
    CC
    TA
    CH
    CYA
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
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    Re: Hardened algae on intex liner

    Sounds more like copper carbonate.
    http://en.wikipedia.org/wiki/Malachite

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    Re: Hardened algae on intex liner

    Okay, I was finally able to get out there today to get some numbers for you. There are a few leaves on the bottom of the pool that I need to scoop out this evening that fell today. here are my numbers:

    FC 3
    CC .5
    TC 3.5
    pH 7.5
    TA 160
    CA 380
    CYA 55

    And here is a pic I got with my phone while getting the numbers.
    Attached Images Attached Images
    Julie

    Atlantic Pool Products "Prestige" metal wall pool 18' x 48" round
    vinyl liner
    Hayward Power Flo pump
    Hayward Perflex DE Filter Model EC50AC

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    Re: Hardened algae on intex liner

    ???
    Julie

    Atlantic Pool Products "Prestige" metal wall pool 18' x 48" round
    vinyl liner
    Hayward Power Flo pump
    Hayward Perflex DE Filter Model EC50AC

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    Melt In The Sun's Avatar
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    Re: Hardened algae on intex liner

    Looks like stained calcium scale to me.
    11,200 gal, Pebble-Tec; Tristar 2-speed 1hp - Swimclear 325 ft2 cart - SWG - A & A in-floor cleaner - Heat pump. For the poolside cooking, a Yoder Wichita and a Big Steel Keg!
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    frustratedpoolmom's Avatar
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    Re: Hardened algae on intex liner

    ya, i'm thinking MITS might be right. Has your PH been above 7.8 for any extended periods?
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
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    Re: Hardened algae on intex liner

    Honestly, I don't know if the pH was up to 7.8 or higher for an extended time. I didn't test it the whole month of July. I know...my bad.

    If I lower the pH for an extended period, would it loosen it or dissolve it?
    Julie

    Atlantic Pool Products "Prestige" metal wall pool 18' x 48" round
    vinyl liner
    Hayward Power Flo pump
    Hayward Perflex DE Filter Model EC50AC

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    Re: Hardened algae on intex liner

    If I lower the pH for an extended period, would it loosen it or dissolve it?
    Perhaps, but I would elevate the chlorine levels first. Keep your FC up around 10ppm or so for a week and see what effect that has. ANY chance you get, scrub the stain trying to loosen just part of it.

    If that fails or you see no improvement after a week or so, then you can consider pH but that's a little trickier and you'll have to test carefully.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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