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Thread: Trying to SLAM...mainly due to algae problems

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    Trying to SLAM...mainly due to algae problems

    Here is what I started with for numbers.
    Basic chlorine 5
    PH 7.8
    FC 5
    CC 0
    TA 220
    CH 110
    CYA 30

    8/25 7pm

    Ive been battling algae all summer on the bottom.

    I added 75oz of 7.8% bleach and will test again at 8pm.

    Will post back then.
    Doughboy 24' x 48" (AG), AQUA Tools Cartridge Filter, Frog System
    2004 Sundance Cameo SPA

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    Mod Squad jblizzle's Avatar
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    Re: Trying to SLAM...mainly due to algae problems

    Good idea. Much easier to follow progress and make recommendations if you post up all the test results and dosages.

    Oh, remember you are supposed to lower the pH before starting to SLAM. As long as the FC is under ten, get that pH down between 7.2 and 7.4
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    Re: Trying to SLAM...mainly due to algae problems

    So I threw in some PH minus stuff based on my ph test numbers at 7pm and will assume its in range since my FC is now 16. Not sure why its so high when I measured based on calculator.
    Doughboy 24' x 48" (AG), AQUA Tools Cartridge Filter, Frog System
    2004 Sundance Cameo SPA

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    Re: Trying to SLAM...mainly due to algae problems

    Doughboy 24' x 48" (AG), AQUA Tools Cartridge Filter, Frog System
    2004 Sundance Cameo SPA

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    Re: Trying to SLAM...mainly due to algae problems

    pH reads artificially high when FC>10. Very likely, your pH was fine where it was, and is currently too low.

    See below.

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    Mod Squad jblizzle's Avatar
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    Re: Trying to SLAM...mainly due to algae problems

    Quote Originally Posted by Abigail K View Post
    pH reads artificially high when FC>10. Very likely, your pH was fine where it was, and is currently too low.
    Where do you get that? Started at 7.8, adjusted the pH down and also added chlorine. No mention of a second pH test.

    I assume the confusion was why the FC is so high. Maybe either the bleach was strong, the pool is smaller than you think, or both, or a testing error.
    Jason, TFP Moderator
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    Re: Trying to SLAM...mainly due to algae problems

    Mis-read that to mean that another pH test was taken and pH read high. Thanks for the clarification Jason.

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    Re: Trying to SLAM...mainly due to algae problems

    So at 8pm im back down to FC of 8 and Ph is 7.5. Why did my FC drop so fast in 2hrs??? Sand pump has been running 24hrs and stuff on bottom is getting worse.
    Doughboy 24' x 48" (AG), AQUA Tools Cartridge Filter, Frog System
    2004 Sundance Cameo SPA

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    Mod Squad jblizzle's Avatar
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    Re: Trying to SLAM...mainly due to algae problems

    Because you have stuff in the pool consuming it.
    Jason, TFP Moderator
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    Re: Trying to SLAM...mainly due to algae problems

    What 2 hrs? Looks like it's more like 24 hrs. And why did you assume its in range because your FC was 16? Did you do a second pH test before you added the bleach? If so, what were the numbers?
    Pool size: 24000gal inground Vinyl-Taylor k-2006 and k-1766 test kits and-speed stir
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    Re: Trying to SLAM...mainly due to algae problems

    Did you read my last post??
    Doughboy 24' x 48" (AG), AQUA Tools Cartridge Filter, Frog System
    2004 Sundance Cameo SPA

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    Mod Squad jblizzle's Avatar
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    Re: Trying to SLAM...mainly due to algae problems

    Yes. You claim 2 hours, but did not post for nearly a day. I don't understand either.

    Are you following the SLAM process? Testing and adding more chlorine every few hours?
    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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    Re: Trying to SLAM...mainly due to algae problems

    Yup, I was referring to #3.
    Pool size: 24000gal inground Vinyl-Taylor k-2006 and k-1766 test kits and-speed stir
    Intermatic P1353ME digital timer w/freeze sensor
    CircuPool Si-45 SWCG System
    Polaris 280 vacuum/Polaris PB4-60 boost pump
    Pentair IntelliFlo VS 3hp Pump--Pentair sand filter

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