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Thread: Green Water

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    Green Water

    Refilled my above ground pool 24 ft round and 5 foot high. Put a New SWG (Aquatrol), everthing worked great with clear water and then the rain came and the family tured the pump time off.

    Problem: Green Water have added Algea and still green. Went to leslies and got the following results.

    FAC: Low (0)
    TAC: low (0)
    Salt: 3000
    Calcium Hardness: 200
    CYA: Low (0)
    Total Alkalinity: 110
    PH: 7.5

    Lost on what to do, got the SWG so I wouldn't have to buy a bunch of chemicals.

    Any Help would be appreciated.
    18 ft above ground pool
    90 sq. ft cartridge filter
    1 hp pump

  2. Back To Top    #2
    Mod Squad JohnT's Avatar
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    Apr 2007
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    SW Indiana
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    Re: Green Water

    Welcome to TFP.

    You should probably start by reading these articles:


    Defeating Algae

    Turning Your Green Swamp Back into a Sparkling Oasis

    Followed by:
    Shocking Your Pool

    and then

    Water Balance for SWCGs

    Pay special attention to the CYA level recommendations. Your SWCG can't keep up with loss from sunlight when your CYA is low.

    It takes a substantial amount of chlorine and persistence to clear it. With the SWCG, you can't shut off the pump for any length of time since you lose your source of chlorine when you do.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

  3. Back To Top    #3

    Re: Green Water

    Looks like I will be adding Bleach or Liquid Chorline to get the FC up.

    Do I need to keep the SWG off and run the pump 24 hours.
    18 ft above ground pool
    90 sq. ft cartridge filter
    1 hp pump

  4. Back To Top    #4
    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    Location
    SW Indiana
    Posts
    9,089

    Re: Green Water

    You don't HAVE to keep the SWCG off, but it really won't contribute a lot.

    Absolutely run the pump until the water is clear. You can make a significant dent in the green overnight if you stay after it. The reason many people have trouble clearing their pool is that they shock, then wait a day to retest. You want to check it hourly at first, then several times a day until things hold.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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