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Thread: Help black algae

  1. Back To Top    #1

    Join Date
    Apr 2015
    Saint Augustine Fl

    Help black algae

    I had mustard algae a few weeks back and it was gone and I did the overnight test and it was fine.

    However we have these frogs that come in from our neighbors pool which is a pond now.

    Anyways I see These black specs around the bottom of the pool where it looks rough(my pool needs to be resurfaced)

    I tried scrubbing with a normal brush but it doesn't move so it must be algae right?

    It seems to be popping up in other parts of the pool. However the frog eggs look similar but when I have the filter running they actually move.

    Any ideas on how to get rid of it?

    I read the FAQ but will a wire brush damage the pool surface?

    Here are my current readings from the TFT100 kit

    6 FC
    0 Combined Chlorine
    6 total chlorine
    7.5 ph
    250 calcium
    80 TA
    40 CYA

    I'm going to get a mesh to prevent the frogs from entering my yard as I believe they are movibg the algae from the pool next door to mine
    Fresh Warer pool15k gallons
    Pentair Clean and Clear RP filter
    Pentair 320 chlorine filter
    1? Hp pump/Pentair Great White vaccum/TF-100 test kit

  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: Help black algae

    The wire brush is needed to break the algae up ... it the plaster is over a year old it should be pretty hard, but if the plaster is really old like it sounds, the brushing could remove some of the plaster.

    If it needs resurface, why worry about damaging it?
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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  3. Back To Top    #3

    In the Industry
    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: Help black algae

    I would SLAM that pool. You don't want or need frogs in there and the higher chlorine will drive them out, I think.

    I don't think that's black algae which occurs in pools that are badly neglected over a period of time. Keep brushing it daily during the SLAM and I bet it will go away.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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