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Thread: Post Slam questions

  1. Back To Top    #1

    Join Date
    Sep 2017
    Location
    Conway, AR
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    Post Slam questions

    I recently completed a SLAM (8 days ago). My CYA before was 55 and now it appears to be about 25-30. What would make it drop that fast?

    My current parameters with a water temp of 56 degrees are :

    FC-17

    CC-0.0

    TA-85

    CH-360

    pH-7.2

    Obviously no swimming with these water temps but we do want to use the SPA. How low does the FC need to drop before thats ok?

    What temp do you turn your SWG back on?
    30K, plaster, heated SPA
    SWG Pentair Intellicholor IC40, pumps- Pentair Intelliflo 2VST X2 (1 for main filtration 1 for water features)
    Pentair remote control, Pentair natural gas heater
    4x four foot canister filters

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    Mod Squad YippeeSkippy's Avatar
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    Jan 2012
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    'burbs of Augusta, Georgia
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    8,855

    Re: Post Slam questions

    It is safe to swim up to SLAM levels of FC.

    Maddie
    Maddie :) 12K Fiberglass IG, Infinity 4000 automatic cover, SWCG, Hayward Sand Filter, Hayward 1.5 Pump, Doheny Discovery Robot, Savi Melody LED pool lights, outdoor speakers and other assorted doo-dads. Sundance Altamar Hot Tub.
    Skippy's Pool Cooler --> Skippy's New Fountain Our Build --> Our Pool Solved Our Sloping Yard

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    duraleigh's Avatar
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    Re: Post Slam questions

    There is NO reason for your CYA to drop like that unless you have diluted your pool by draining and adding new water.

    There is a testing error somewhere.......a SLAM has no significant affect on CYA
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  4. Back To Top    #4

    Join Date
    Sep 2017
    Location
    Conway, AR
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    Re: Post Slam questions

    Quote Originally Posted by duraleigh View Post
    There is NO reason for your CYA to drop like that unless you have diluted your pool by draining and adding new water.

    There is a testing error somewhere.......a SLAM has no significant affect on CYA
    That was my first thought. We did have almost 15" of rain over the last 2-3 weeks requiring me to drain the pool 3 times. That is probably the reason as it did dilute everything else as well. I had concentrated on restoring Alk/Ca/FC due to the low temps. I'll get on the CYA replacement.
    30K, plaster, heated SPA
    SWG Pentair Intellicholor IC40, pumps- Pentair Intelliflo 2VST X2 (1 for main filtration 1 for water features)
    Pentair remote control, Pentair natural gas heater
    4x four foot canister filters

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