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Thread: best times to add chlorine

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    best times to add chlorine

    Hey guys, I am losing approx 3 ppm daily in my pool with 10 hrs of direct sunlight and heat. I am not stressing about this.
    Would it make more sense to add 1/2 of what I need in the morning when my pump kicks on, and the other 1/2 about an hour before my pump kicks off?
    I am currently using pool math to bring my FC level to the correct level using 8.25% bleach, and I add it all at one time in the morning when my pump turns on.

    I am currently running my sand filter pump 10 hrs a day.
    My latest CYA level was 70. It is high due to using the trichlor pucks before I learned about the BBB process. I am currently converting from EZ pool to the BBB method.
    25K gal vinyl liner built 2012, 18x36 IG, deep end, Pentair 1.5 HP single speed pump, Pentair Tagelus 325lb sand filter, Kreepy Krauly Legend auto cleaner, inline chlorinator, one skimmer basket, 2 main drains, 4 return jets, 2 water sprinklers, newly acquired Taylor K-2006, sample sizer and speed stir.

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    Mod Squad jblizzle's Avatar
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    Re: best times to add chlorine

    Does not really matter as long as the FC never drops below the minimum for your CYA.
    Many people prefer to add it in the evening so that the FC levels are higher over night before the losses to the sun start.
    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
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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    April's Avatar
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    Re: best times to add chlorine

    I add the full amount needed every evening.
    18ft Round AG, Vinyl, 100LB Pentair Sand Filter, 1HP, June 2012, TF-100 w/SpeedStir

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    Re: best times to add chlorine

    Ok, so test in the evening?
    25K gal vinyl liner built 2012, 18x36 IG, deep end, Pentair 1.5 HP single speed pump, Pentair Tagelus 325lb sand filter, Kreepy Krauly Legend auto cleaner, inline chlorinator, one skimmer basket, 2 main drains, 4 return jets, 2 water sprinklers, newly acquired Taylor K-2006, sample sizer and speed stir.

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    Mod Squad jblizzle's Avatar
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    Re: best times to add chlorine

    Or in the morning
    Does not matter.

    Just be sure you have the pump on for at least 30 minutes before testing and 30 minutes after adding chemicals.
    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
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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    Re: best times to add chlorine

    Whatever fits your routine.

    I tend to run late in the morning, so I don't have time to test and add chlorine before work. Instead, I wait until 8:00 or so every evening, clean my skimmers, test and add chlorine. So far, so good.
    25,000 gallon freeform gunnite/plaster, built in the 1970s/80s; Sta-Rite 9463004 575-lb. sand filter; Sta-Rite DuraGlas/Max-E-Glas (P2RA5F-125L) single-speed 1.5 HP pump, manufactured 12/1993 (1M93M).
    Helpful links: TFTestKits; Pool School; ABCs of Pool Water Chemistry; Chlorine/CYA Chart; PoolMath; SLAM - Shock Level And Maintain

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    Re: best times to add chlorine

    Is it best to test in the deep end near a return jet?
    Does the depth of the sample taken matter?
    25K gal vinyl liner built 2012, 18x36 IG, deep end, Pentair 1.5 HP single speed pump, Pentair Tagelus 325lb sand filter, Kreepy Krauly Legend auto cleaner, inline chlorinator, one skimmer basket, 2 main drains, 4 return jets, 2 water sprinklers, newly acquired Taylor K-2006, sample sizer and speed stir.

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    Mod Squad pooldv's Avatar
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    Re: best times to add chlorine

    It doesn't matter a lot. There seems to be an idea that taking the sample a foot or so deep. I put the sample container in the pool upside as far as i can reach and turn it over to fill it.

    The important part is to understand your pool's chlorine usage and to always keep it above minimum for your CYA level and the Chlorine CYA Chart. Always. So, add enough chlorine/bleach so that the chlorine level will be above minimum next time you add. Don't be nervous about taking the FC above target. It is safe to swim when FC is above minimum and below shock level for your CYA.
    TFP Moderator
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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