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Thread: Maintaining target FC level

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    Join Date
    Jun 2016
    Location
    Austin Texas
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    22

    Question Maintaining target FC level

    I am in Austin and its insanely hot and sunny everyday. I am losing 4ish ppm per day and looking for suggestions on the best method to maintain my target FC level of 7-8. If I add bleach in evening should I go up to 10 and let it drop to 6ish during the day or is there a better method that does not involved multiple additions per day?

    Thanks,
    13,500 gal in ground pool with pebble tec liner, intelliflow variable speed pump, cartridge filters, UV filter and solar heater.

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    JoyfulNoise's Avatar
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    May 2015
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    Tucson, AZ
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    Re: Maintaining target FC level

    Can you provide your latest water test results? Do you have one of the recommended test kits?
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

  3. Back To Top    #3

    Join Date
    Jun 2016
    Location
    Austin Texas
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    22

    Re: Maintaining target FC level

    Yes, I have the proper test kit. Last night they were:

    FC: 5.5
    CC: 0
    CYA: 65
    TA: 90
    PH: 7.6
    13,500 gal in ground pool with pebble tec liner, intelliflow variable speed pump, cartridge filters, UV filter and solar heater.

  4. Back To Top    #4

    Join Date
    Jan 2014
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    Buckeye AZ
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    807

    Re: Maintaining target FC level

    Do you mean to say that your "target" is 7 ppm of CL, or that your minimum is 7?

    If your target is 7, that puts your minimum around 5. So I see no problem going up to 10 at sundown and dropping down to 6 by the next afternoon. The first few ppm you will lose faster, e.g. you will drop from 10 down to 7 faster than from 7 down to 5, as the higher you go over the target, the more CL is exposed to UV.
    10,500 gal IG, Topaz Pebble, auto-level
    Hayward DE filter, 2HP Ecostar VSP, ProLogic PS-4, GVA actuators
    Cal Pools Wave Force Plus (wall return jets plus 2 floor pop-ups), Venturi Skimmer
    Water sheer, 2 wok pots, bubbler stem on the baja step
    ColorLogic Mutlicolor LED lamp. Taylor 2006+speed stir

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    Mod Squad jblizzle's Avatar
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    May 2010
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    Tucson, AZ
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    37,389

    Re: Maintaining target FC level

    If you do not suspect algae in the water, then you just need to target higher so your do not drop below the minimum for your CYA level.

    For a 65ppm CYA, your minimum is 5ppm, so I would target 10ppm to be sure it does not drop below 5ppm. Maybe Perform the Overnight Chlorine Loss Test to be sure nothing is in the water.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
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