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Thread: water tests look good, but small amount algae on walls

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    water tests look good, but small amount algae on walls

    FC = 7
    CC = 0
    TA = 80
    CYA = 85
    PH = 7.3
    TC = 90
    SWG pool, 23,000 gals, AquaRite displaying 3500, using an Aquagenie skimming system

    I have been noticing bands(3 inch x 1/2 foot sections) on the walls, just under the waterline. simple brush takes care of it. Water is sparkling, but is this normal?

    Thanks!
    Brian
    25,000 gallon, in-ground, vinyl liner
    Hayward S244T sand filter
    Hayward super-pump 1.5 Horse
    Hayward Aquarite SWG
    Pool construction 1999

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    Re: water tests look good, but small amount algae on walls

    but is this normal?
    Algae is never normal. Adequate chlorine and circulation of the pool water will eliminate all algae. Brushing more often may help end it.

    Your numbers look very good but I suspect your chlorine has been lower in the past to allow that algae to get a foothold.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: water tests look good, but small amount algae on walls

    Dave,
    Thanks for the response! I have a feeling that you are right about circulation. I have the pool running for 7 hours. I might try to add some more hours and see if that makes a difference. Is it better to run ,say 10 hours straight or two 6 hour runs?

    Thanks again,
    Brian
    25,000 gallon, in-ground, vinyl liner
    Hayward S244T sand filter
    Hayward super-pump 1.5 Horse
    Hayward Aquarite SWG
    Pool construction 1999

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    Re: water tests look good, but small amount algae on walls

    I start in the Spring with 2 - 3 hour runs and now am at 3 - 3 hour runs. I will increase that to probably 12 hours total in the heat of the summer. Each pool is different and you have to figure out what suits your pool and schedule best.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Richard320's Avatar
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    Re: water tests look good, but small amount algae on walls

    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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    Butterfly's Avatar
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    Re: water tests look good, but small amount algae on walls

    What is the pool surface (plaster/pebble, vinyl or fiberglass) and, what type brush are you using?
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
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    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

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    Re: water tests look good, but small amount algae on walls

    vinyl, generic pool brush...
    Brian
    25,000 gallon, in-ground, vinyl liner
    Hayward S244T sand filter
    Hayward super-pump 1.5 Horse
    Hayward Aquarite SWG
    Pool construction 1999

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    Re: water tests look good, but small amount algae on walls

    brianmac:

    Here's a Pool School article on determining pump run time: http://www.troublefreepool.com/pool-.../pump_run_time. This is the process I followed when I switched to BBB. As duraleigh stated, each pool is different. We could both follow the same process outlined in the article, but wind up with a different sweet spot in terms of pump run time. One thing I did while experimenting with the run times is keep a log dating each run time adjustment along with the total run time. Once you find your sweet spot, you may need to make adjustments based on seasonal factors and events such as a high bather load and/or heavy rain. Again, I keep a weekly log of current pump run time, test results, and water temperature (I'm a bit of a data junkie). This comes in handy each season as a good baseline.

    Of course, whenever you are shocking, the pump should be run 24/7 during the shock process, pausing only to clean filters or backwash as needed (based on your filter PSI).
    Gold Supporter, TFP Lifetime Supporter, 26,680 gal Plaster IGP 3.5 - 10' depth / Attached Waterfall Spa, Manually Chlorinated, Triton Sand Filter, 1.5 HP * 1.1 SF = 1.65 SFHP 1-speed Pentair WhisperFlo WF-26 Pump, 400K BTU NG Teledyne Laars Series One Heater, Polaris 360, Test Kit Comparison, Chlorine/CYA Chart, SLAMing Your Pool, OCLT
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