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Thread: daily chlorine dosing question

  1. Back To Top    #1

    Join Date
    Jun 2015

    daily chlorine dosing question

    hey all-
    let me first just say I love, Love, LOVE this site. I'm so glad to be free of the pool store!

    anyway, just getting everything stable now, pool looks great. I have a couple of adjustments to make, but nothing big. my question is on my daily (liquid!) chlorine dose.
    I'm wondering if there is a "rule of thumb" I can look to, or do I need to test daily for a while to figure it out, then base my dosing on that?
    22500gallon plaster pool, white bottom
    hayward 1.5hp pump,Hayward swim clear cartridge filter.

  2. Back To Top    #2
    Richard320's Avatar
    Join Date
    Jan 2010
    San Dimas, CA (LA County)

    Re: daily chlorine dosing question

    Test daily until you can guess accurately what you'll see before the first drop leaves the bottle. You'll probably spot the pattern within a few weeks. At that point, you can just dump in the usual amount every day and start testing every other day. Don't be too hasty. You can buy a lot of test reagents for what the bleach to do a SLAM will cost.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

  3. Back To Top    #3
    Mod Squad JVTrain's Avatar
    Join Date
    Feb 2014
    Central Minnesota

    Re: daily chlorine dosing question

    Testing daily is the best route to knowing what your pool needs each day. For the first week or so, I'd recommend doing the FC/CC test with the FAS-DPD reagents just to get the hang of it and to feel confident in your chlorine levels without the guessing about which color you match in the color block TC test. Do that test as well to "calibrate" your eyes so you know what 3 TC, 4 TC and 5 TC look like when you know what it is from the FAS-DPD test. Also do the pH test daily. Do the TA test a few times as well. CH and CYA don't need to be done unless you want to get more comfortable with the CYA test.

    Once you do that for a week or so, you'll know what your pool consumes for chlorine each day. Keep in mind, your CYA level, sun exposure and bather load all come into play. Posting your test results each time you do them here is a great way to document them and get suggestions if needed. If you don't post them here, keep a log of your own at home for a while.
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
    Isolated Spa - 345 Gallons

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