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Thread: Yellow algae in shady parts of pool

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    Yellow algae in shady parts of pool

    Besides brushing, what should I do about yellow algae that keeps coming back in the shady parts of the pool? I can only service the location once a week.

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    Mod Squad woodyp's Avatar
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    Re: Yellow algae in shady parts of pool

    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
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    gonefishin's Avatar
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    Re: Yellow algae in shady parts of pool

    Quote Originally Posted by woodyp
    http://www.troublefreepool.com/pool-school/mustard_algae

    There ya' go.
    Nicely written post on mustard algae
    33' Aqua-Leader AGP
    Hayward cartridge filter and IntelliFlo VS pump.
    Solar Heat coming ; used to own Aqua-Cal HeatWave 100k (HeatPump)
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    Re: Yellow algae in shady parts of pool

    Thanks

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    Re: Yellow algae in shady parts of pool

    Just remember that with yellow/mustard algae you need to completely eradicate it from all possible areas it likes to hide including behind light niches, under removable ladders, etc. If you don't, then it may come back because normal chlorine levels that prevent green and black algae growth are not sufficient to prevent yellow/mustard algae from growing. If you can't eradicate it, then you either need to maintain roughly double the normal chlorine level (so an FC that is around 15% of the CYA level instead of 7.5%) or you need to use other alternatives that are a last resort such as sodium bromide (turns the pool into a bromine pool, at least for a while) or a phosphate remover.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
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