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Thread: quick question on swimming after adding chemicals

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    quick question on swimming after adding chemicals

    Hi all,

    Well after an enjoyable winter of maintaining my own pool via all I've learned here, we are finally in the season to actually swim in it! I was wondering how much time should be allowed after certain chemicals are added before swimming:

    Chlorine - I use the 10% sodium hypochlorite liquid chlorine and keep my FC around 7 or 8 (my CYA is a bit high). So in my pool, my FC moves from 6 to 7 with 16 ounces. First, I assume it is fine to swim in water with FC at 7 or 8, correct? If I dump in one or two pints, do I just need to wait for it to circulate?

    Muriatic acid - I use the liquid to maintain PH. My PH doesn't move real fast, just goes up slowly so I only add some occasionally. Same question on wait time. Obviously this is dangerous stuff!

    CH increaser (calcium chloride) - I don't have to add that very often, but I'd assume with that 24 hours would be smart. Thoughts?

    My numbers today:

    FC - 6 (put in two pints LC to bring up to 8)
    PH - 7.7
    TA - 80
    CH - 330
    CYA - 80
    temp - 84

    Thanks for any feedback.
    15000 gallon in-ground concrete pool, plaster finish. 1hp Sta-Rite P6RA6E-205L pump, Sta-Rite 2 cartridge filter, Rheem electric heat pump, no spa or water features.

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    Patrick_B's Avatar
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    Re: quick question on swimming after adding chemicals

    If you want to be super safe with Acid or Bleach, give it one hour. Less if you give the pool a good brushing after the additions. I never added the CH increaser, but it should dissolve pretty fast. As soon as it does, I see no reason to wait longer.
    TFP Moderator
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    Mod Squad kimkats's Avatar
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    Re: quick question on swimming after adding chemicals

    So long as FC is not at or above SLAM level it is safe to swim in. Your 7 or 8 is very safe to swim in. I add mine about let 15 mins or so pass to call it safe.

    Muratic acid...........I add AFTER everyone is out of the pool and no one is around me. I hate this stuff and do not take any chances.

    No sure about CH increaser as I do not use it so have not studied up on it sorry

    Is your PH staying kind of stable?

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

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    Re: quick question on swimming after adding chemicals

    I am a bad parent..My family has swam more than once while I am adding bleach.
    16x32 IG rectangular 21,800k new vinyl liner 2014, Triton II TR 50 sand Filter, Pentair 3/4 hsp whisperflow pump, 3 returns, TF100 test kit w/speedstir. Maytronics s 300i robot.

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    borjis's Avatar
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    Re: quick question on swimming after adding chemicals

    I dose a bit higher than upper target about an hour before guests arrive.
    16x32 IG Vinyl, 13,000 Gals. Hayward S-244T sand filter, SP2810X15 pump
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    Mod Squad JVTrain's Avatar
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    Re: quick question on swimming after adding chemicals

    Quote Originally Posted by Chrissykr View Post
    I am a bad parent..My family has swam more than once while I am adding bleach.
    I've almost done that. More like:

    "Everyone go grab a drink or a snack."
    *dumps in a gallon of 12.5%... maybe a little too quickly*
    *brushes the bottom of the pool in the area*
    "Back in the pool everybody!"

    On topic, the general recommendation is 30 minutes of circulation to be on the safe side with bleach or MA. If you're adding CYA, you can swim while it's dissolving in the sock. Easier to swim around and squeeze it once in a while! Most other solids dissolve quickly so as soon as they're not visible. If you brush after adding chemicals, that certainly helps as well and can probably hop in sooner.
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
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    Re: quick question on swimming after adding chemicals

    Thanks everyone for the feedback - and the humor. On the PH question, my PH does seem to rise slowly and consistently (my pool is 10 years old). But it doesn't swing a lot. Have to add a little acid once a week, sometimes twice.
    15000 gallon in-ground concrete pool, plaster finish. 1hp Sta-Rite P6RA6E-205L pump, Sta-Rite 2 cartridge filter, Rheem electric heat pump, no spa or water features.

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    Mod Squad JVTrain's Avatar
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    Re: quick question on swimming after adding chemicals

    As you keep maintaining your pH, your TA level will be reduced as well. Every time you add acid, the TA will go down. Let your TA get as low as 60 ppm and see how your pH behaves. You'll likely have less frequent acid additions at a bit lower TA. Below 60 ppm, your pool will lose pH buffering capacity so if it dips BELOW 60, then bump it back up to 60 or 70.
    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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    Flbeachluvr's Avatar
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    Re: quick question on swimming after adding chemicals

    Just want to say "hi" neighbor. I'm in Port Orange almost to NSB.
    Pool completed 3/21/2016
    8800 gallons, plaster 14' x 24', 3/4 hp Hayward pump, Hayward cartridge filter, Blue Essence T-5 SWG, Kreepy Krauly Kruiser, Taylor K-2006 test kit with Speedstir, Taylor K-1766 salt test and 250 sq. ft. of Heliocol solar panels with Pentair Solartouch control system

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    Re: quick question on swimming after adding chemicals

    Thanks JVTrain for the info on TA - my TA had gotten to 70 and I thought I was supposed to keep it higher so got it back up to 90. At 80 right now.

    Hi Flbeachluvr - nice to hear from a neighbor here as well. Cheers!
    15000 gallon in-ground concrete pool, plaster finish. 1hp Sta-Rite P6RA6E-205L pump, Sta-Rite 2 cartridge filter, Rheem electric heat pump, no spa or water features.

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