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Thread: Should I SLAM???

  1. Back To Top    #1

    Join Date
    Jun 2014
    Location
    SD
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    26

    Should I SLAM???

    I am new this summer to the Trouble Free Method, so I am still learning. With that said, I'm not sure if I should SLAM or not... I am losing chlorine overnight - last night was 2ppm. The water looks clear but there is a gray 'powdery' looking material on the bottom - even after vacuuming yesterday. One other factor changed in the past week. My sand filter started making a 'crackling' sound - like air is in it. I talked to pool store and they said the sand needs changed. Could the gray powdery material be something the filter is pushing back in and that is eating up the chlorine? Should I get filter sand changed before SLAMing? Thank you for any advice!
    30,000 gallon, 20x40, IG, vinyl, sand filter

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    Patrick_B's Avatar
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    Jun 2011
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    Midland TX
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    Re: Should I SLAM???

    Highly doubtful that the sand needs changing. It may beneifit from a deep cleaning, but you may not even need that. How does your water look, and what else has been going on?
    TFP Moderator
    Essential Links:
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    28K Gal IG FreeForm, CLI Quartz, Pentair 36"SF & VS Pump, Dolphin M5, Rheem

  3. Back To Top    #3

    Join Date
    Jun 2014
    Location
    SD
    Posts
    26

    Re: Should I SLAM???

    Water looks great. Just using up chlorine... Here are my numbers:

    FC = 8
    CC = 0
    PH = 7.6
    TA = 250
    CYA = 70

    I don't test CH because I have vinyl.

    Filter pressure is running much higher than normal and new crackling sound leads me to think air is getting in...?
    30,000 gallon, 20x40, IG, vinyl, sand filter

  4. Back To Top    #4
    Patrick_B's Avatar
    Join Date
    Jun 2011
    Location
    Midland TX
    Posts
    15,001

    Re: Should I SLAM???

    Sounds like a SLAM wouldn't hurt. I would drop the pH to 7.2 and get it rolling. Might be a quick one.
    TFP Moderator
    Essential Links:
    ABC's Of Pool Chemistry, Test Kits, SLAM Your Pool
    28K Gal IG FreeForm, CLI Quartz, Pentair 36"SF & VS Pump, Dolphin M5, Rheem

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