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Thread: Pool Math help for Trichlor and vacation

  1. Back To Top    #1

    Join Date
    Jul 2015
    Katy, TX

    Pool Math help for Trichlor and vacation

    Hi all,

    We are heading on vacation for 8 days and I'm trying to figure out how many tabs to leave in floaters. I've never used tabs, but the previous owner did and left us plenty.

    Our current CYA is 50, which is honestly a little low for our direct sun, Texas heat. Our current FC demand is 3ppm without swimmers. If I'm doing math correctly, each tablet will give us 3.5 ppm FC, is that correct?

    So if I raise to SLAM level, I can buy us 2 days of chlorine, but how many tablets? And what flow of the floaters? I'm thinking 6 tablets just to give us enough cover, but is that overkill?

    Thanks in advance!

    15k gal IG plaster w/ water feature; 600 gal spa w/ spillway; Pentair VS+SVRS Pump; Pentair FNS Plus DE Filter; Pentair MiniMax NT Heater; Rainbow Lifegard 320 In-Line Feeder (no idea what this does or how it works); Polaris 3900 Sport Cleaner (constantly on its side); Compool Lx3800 Control System; TFT-100 test kit.

  2. Back To Top    #2
    JoyfulNoise's Avatar
    Join Date
    May 2015
    Tucson, AZ

    Re: Pool Math help for Trichlor and vacation

    3" tablets are ~ 8oz each of trichlor (assuming their not some multipurpose tablet). So you can load up a floater with as many tablets as it will hold that keeps you below the CYA target you want to be at. Every 10ppm of FC added by trichlor brings along with it 6ppm CYA. So figure out how much FC you get from one tablet and the CYA will limit how many you can add.
    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

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