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Thread: Could it be my filter?

  1. Back To Top    #1

    Join Date
    Sep 2011
    Location
    Springfield, MO
    Posts
    34

    Could it be my filter?

    Sand filter
    20,000 gal pool
    FC 24
    CC. 0
    CYA 40
    pH 7.7
    TA90

    Shock, vacuum, backwash, repeat. Been doing this for a couple of weeks and still getting green residue on the bottom and sides. Went to a higher FC shock - 15 up to 20/24 - thinking maybe it's mustard algae... How do you tell?

    Now I'm beginning to question my filter since the pool gets cloudy after vacuuming manually or with the APC. Crossing my fingers it's channelling but how do I tell if I just need to change to new sand?

    Any recommendations on sand replacement both product and process?
    17 x 32 feet in-ground - 22,500 gallons - Vinyl liner
    Haywood sand filter (Model TBD) - Pump (TBD)
    Hot Spring spa
    Total noob...

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    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,085

    Re: Could it be my filter?

    still getting green residue on the bottom and sides
    Green = live algae. Use chlorine to kill algae.

    Brush it up, stir it up, get it mixed into that chlorine laden water. Your filter will not kill it, it can only filter out the dead stuff
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3

    Join Date
    Sep 2011
    Location
    Springfield, MO
    Posts
    34

    Could it be my filter?

    OK... Brought TC up to 24, brushed and stirred it like a big bowl of stew. Leaving town on business until next Friday. Crossing my fingers my better half can keep up the pace...
    17 x 32 feet in-ground - 22,500 gallons - Vinyl liner
    Haywood sand filter (Model TBD) - Pump (TBD)
    Hot Spring spa
    Total noob...

  4. Back To Top    #4

    Join Date
    Feb 2008
    Location
    Denton, TX
    Posts
    5,061

    Re: Could it be my filter?

    The better job you do of keeping the FC at shock level, the quicker your algae issue will be corrected.

  5. Back To Top    #5

    Join Date
    Sep 2011
    Location
    Springfield, MO
    Posts
    34

    Could it be my filter?

    Got home Friday and not much improvement, but at least the better half kept things from getting worse. Back to keeping TC uo around 17/19 and brushing.
    17 x 32 feet in-ground - 22,500 gallons - Vinyl liner
    Haywood sand filter (Model TBD) - Pump (TBD)
    Hot Spring spa
    Total noob...

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