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Thread: Gatorade yellow algae growing on my pool sides?

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    zimm's Avatar
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    Gatorade yellow algae growing on my pool sides?

    I'm only 2 weeks into pool ownership. Been testing with my TF-100 daily. FC is hovering around 3-5, Ph 7.2, TA 110, and CYA was 0, but after 1lb of stabilizer, just checked in at 30. I'm getting lime yellow/green growth in the corners of my sitting area and steps and it's building on the sides and on some of the water returns. I just brushed the pool a few days ago. Do I need to shock? Scrub more? First time dealing with algae on the gunite. Water looks great though.
    45'x12' 17k gal, IG plaster, Pool Pilot Nano+ SWG, 1/2hp Whisperflo pump, PAC-FAB TA-60D sand filter, Raypak 266 heater
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    Re: Gatorade yellow algae growing on my pool sides?

    Shock your pool.

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    techguy's Avatar
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    Re: Gatorade yellow algae growing on my pool sides?

    Pool calculator tells me you need 385 oz of 8.25 bleach to get to the PoolSchool recommended 17FC.

    Pour those in tonight and see where you are tomorrow morning.
    -- Guy --
    10K gallons in 21' Round 52 inch wall Aqualeader AG, Hayward Power Flow LX 1.5 HP pump motor, Hayward Perflex EC50AC DE filter w/Cellulose, Wide mouth skimmer, 2013 new Diver Dan (craigslist) to replace the faded old Hayward AquaBug. TF-100

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    Re: Gatorade yellow algae growing on my pool sides?

    You have mustard algae. Start the shock process and then BRUSH those walls and floors often, stirring up the algae and exposing it to the increased chlorine in your pool.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    zimm's Avatar
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    Re: Gatorade yellow algae growing on my pool sides?

    Bummer. I'm having a 4th July pool party. Do I have time to shock now? Can I scrub it and get past the party then shock? Is it dangerous to swim in now?

    With cya of 30, pool calc shows 205 oz of 8.25 bleach to go from 4 to 12.....
    45'x12' 17k gal, IG plaster, Pool Pilot Nano+ SWG, 1/2hp Whisperflo pump, PAC-FAB TA-60D sand filter, Raypak 266 heater
    Pool School + Test Kit + Pool Math = Trouble Free Pool

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    techguy's Avatar
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    Re: Gatorade yellow algae growing on my pool sides?

    Is the water clear? I would say as long as your FC is below shock for your CYA, you are safe to swim. I would make your best effort each night but let it drift down for the party. But... after the party, get your FC back to shock levels. I would even say to have your chlorine measured and ready to pour so you can enjoy your party knowing you are ready ... for after that party. If you have mustard algae, the FC levels required are even higher.

    Just my two cents.
    -- Guy --
    10K gallons in 21' Round 52 inch wall Aqualeader AG, Hayward Power Flow LX 1.5 HP pump motor, Hayward Perflex EC50AC DE filter w/Cellulose, Wide mouth skimmer, 2013 new Diver Dan (craigslist) to replace the faded old Hayward AquaBug. TF-100

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    zimm's Avatar
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    Re: Gatorade yellow algae growing on my pool sides?

    Yes it's clear. If hate to dump 2 gallons of bleach in right before kids will swim. I can put it in tonight and let FC drop for the 4th...
    45'x12' 17k gal, IG plaster, Pool Pilot Nano+ SWG, 1/2hp Whisperflo pump, PAC-FAB TA-60D sand filter, Raypak 266 heater
    Pool School + Test Kit + Pool Math = Trouble Free Pool

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    Richard320's Avatar
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    Re: Gatorade yellow algae growing on my pool sides?

    Quote Originally Posted by zimm
    Yes it's clear. If hate to dump 2 gallons of bleach in right before kids will swim. I can put it in tonight and let FC drop for the 4th...
    You'll be dumping bleach in again before the fourth. I'd get to work with the brush and raise that FC up and repeat it again and again as often as you can before the party. There's a chance it will be cleared up by then. You still have a couple days.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    zimm's Avatar
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    Re: Gatorade yellow algae growing on my pool sides?

    Cool. Just dumped two Costco 120-somethings of 8.25 and fired up the pump for the night. Will
    Check in the AM.
    45'x12' 17k gal, IG plaster, Pool Pilot Nano+ SWG, 1/2hp Whisperflo pump, PAC-FAB TA-60D sand filter, Raypak 266 heater
    Pool School + Test Kit + Pool Math = Trouble Free Pool

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    techguy's Avatar
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    Re: Gatorade yellow algae growing on my pool sides?

    Is it looking any better today?
    -- Guy --
    10K gallons in 21' Round 52 inch wall Aqualeader AG, Hayward Power Flow LX 1.5 HP pump motor, Hayward Perflex EC50AC DE filter w/Cellulose, Wide mouth skimmer, 2013 new Diver Dan (craigslist) to replace the faded old Hayward AquaBug. TF-100

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    Re: Gatorade yellow algae growing on my pool sides?

    In the summer the pools I've seen can get green algae in the corners/steps if the pump isn't running enough and the FC level drops corresponding with a huge rainfall. Did you recently get a big rain?
    15000 Gal Pool + Spa - Twin 2hp Pentair Pumps - DE Filter - 400kbtu Heater - Jandy wireless control system with freeze out - Polaris 3900 pressure side cleaner

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    zimm's Avatar
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    Re: Gatorade yellow algae growing on my pool sides?

    Alright, the pool is fixed. Looked great the next morning. I zapped a few remaining spots with a brush and all looks good. TC level peaked at 15 with 2 large bottles of Clorox. CC was .5-1.0. Haven't done the DPD test today, but yesterday the yellow test off the scale so looking pretty good. Been running the pump 24/7, but now dropped it to 12 hours a day.
    45'x12' 17k gal, IG plaster, Pool Pilot Nano+ SWG, 1/2hp Whisperflo pump, PAC-FAB TA-60D sand filter, Raypak 266 heater
    Pool School + Test Kit + Pool Math = Trouble Free Pool

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