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Thread: crystal clear a little algae

  1. Back To Top    #1

    Join Date
    Jun 2009
    Location
    Island of Long, NY
    Posts
    11

    crystal clear a little algae

    Got my TF-100 great kit, water has been crystal clear. Arrived home after being away for 3 days and have a little visable algae. The water is very clear.
    FC-5.5
    CC-0.5
    CYA-90
    PH-7.5
    I put in enough bleach to bring FC up to 7 as per the pool calculator and CYA chart. Just wondering should I shock now, something is causing the algae? Or just make sure the FC stays at 7. Kids don't use the pool like they used to, to cold for the bride, and I just dive in and get out. It looks nice though
    thanx jimmy
    Jimmy
    22108 gal. ig, vinyl, 44 gpm sand filt, 1 1/2 hp pump

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    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    Location
    SW Indiana
    Posts
    8,617

    Re: crystal clear a little algae

    For your CYA of 90, if you don't have a SWCG, you want to keep your chlorine around 10ppm. 7 is the minimum. I'd recommend raising it to shock level to get rid of the algae that is starting.
    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
    frustratedpoolmom's Avatar
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    May 2007
    Location
    SWSuburban Chicago, IL
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    11,963

    Re: crystal clear a little algae

    Can you describe the algae?
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

  4. Back To Top    #4

    Join Date
    Jun 2009
    Location
    Island of Long, NY
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    11

    Re: crystal clear a little algae

    Yes it's the same green algae I always get, yesterday bottom of pool felt slimly till I brushed it. So according to the CYA chart the shock level should be 35, how long should it be kept there because the CC is already 0.5
    or till I have CC of 0.0 .... I vacuumed most of the algae, just some in the nooks that I'll brush after I shock.
    Thanx Jimmy
    Jimmy
    22108 gal. ig, vinyl, 44 gpm sand filt, 1 1/2 hp pump

  5. Back To Top    #5
    frustratedpoolmom's Avatar
    Join Date
    May 2007
    Location
    SWSuburban Chicago, IL
    Posts
    11,963

    Re: crystal clear a little algae

    You have to shock until the FC holds overnight, or you lose less then 1ppm. CC is .5 or less.

    Refer to Pool School for instructions on doing the Overnight Loss Test correctly.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

  6. Back To Top    #6

    Join Date
    Jun 2009
    Location
    Island of Long, NY
    Posts
    11

    Re: crystal clear a little algae

    Will do thanks
    Jimmy
    22108 gal. ig, vinyl, 44 gpm sand filt, 1 1/2 hp pump

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