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Thread: FC and opening question

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    JayG's Avatar
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    FC and opening question

    The pool was opened ~3 weeks ago, and when I took off the cover the water was pretty cloudy and there was lots of debris. I cleaned out the debris, but decided to raise the FC to shock levels to be on the safe side. The FC has been slowly going down, but remains higher than my target range even at 3 weeks out. Any reason to worry? No one is going to swim in the pool as the water temp is still 57F. I'm just thinking about the pool and the equipment circulating the water.

    Current values:

    FC 21
    CC 0.5
    pH 7.8
    TA 80
    CH 275
    CYA 70

    3 weeks ago I started with FC 28 and a CC of 0.

    The water is clear and sparkling (but very cold!). We have had a fair amount of rain and lots of pollen in the interim.

    Thoughts? Concerns?

    Thanks,

    Jay
    Jay--Metro NYC
    35K gal, in-ground, free-form, pebble finish, 2 skimmers, 3 returns, autofill. No spa, no features. Partial shade.
    Pentair C&C cartridge filter (400 sq in), Pentair VS pump, Pentair 140 btu heat pump, Triton Plus Robo-cleaner; Stenner with 55 gal bleach cistern. TFT 100 test kit.

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    Texas Splash's Avatar
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    Re: FC and opening question

    No problems. Your FC, while higher than you might like on a typical day, is still below the SLAM level for your CYA of 70. It's just taking a while because of the cold temps and spring angle of the sun. That FC will lower soon enough. Looking good Jay.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
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    Mod Squad woodyp's Avatar
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    Re: FC and opening question

    Do an overnight OCLT to be sure.
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    JayG's Avatar
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    Re: FC and opening question

    Quote Originally Posted by woodyp View Post
    Do an overnight OCLT to be sure.
    I didn't do an OCLT but I rechecked FC 2 days ago and it was 20. 2 days later the FC is 19 and CC was 0. I think I'm OK. FC is slowly coming down.

    The water remains crystal clear.
    Jay--Metro NYC
    35K gal, in-ground, free-form, pebble finish, 2 skimmers, 3 returns, autofill. No spa, no features. Partial shade.
    Pentair C&C cartridge filter (400 sq in), Pentair VS pump, Pentair 140 btu heat pump, Triton Plus Robo-cleaner; Stenner with 55 gal bleach cistern. TFT 100 test kit.

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