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Thread: Can I add Acid and Chlorine at same time

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    Can I add Acid and Chlorine at same time

    Can I add Muriatic Acid an Chlorine at the same time
    Mike Marchi
    Southern California
    14000 Gal IG Pool, Dark Grey Plaster, Purex 4000 DE Filter (54Cubic Ft), WisperFlo 2HP pump
    Purex 400000 BTU Heater, Navigator Pool Cleaner, Granite waterfall with 2HP pump

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    dmanb2b's Avatar
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    Re: Can I add Acid and Chlorine at same time

    NO...please NO...they do not mix well ...let your water circulate at least 30 minutes between additions of either

    Also be very careful while adding MA...wear gloves and face away from the MA steam as it can do a number on your eyes and lungs...you'll know what I'm talking about if you get a whiff.
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

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    Butterfly's Avatar
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    Re: Can I add Acid and Chlorine at same time

    Yep, what dmanb2b said. I would even say allow one hour of circulation between additions.

    Also, on this subject (sorta), store your MA away from your chlorine source.
    Example: I store my MA under the deck behind a brick pillar. It gets heat but not direct sunlight. I store my bleach in the garage.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

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    Re: Can I add Acid and Chlorine at same time

    Quote Originally Posted by Butterfly
    Yep, what dmanb2b said. I would even say allow one hour of circulation between additions.

    Also, on this subject (sorta), store your MA away from your chlorine source.
    Example: I store my MA under the deck behind a brick pillar. It gets heat but not direct sunlight. I store my bleach in the garage.
    Now Joyce (Hi to you and Johnny by the way ), where on Earth did you hear about not keeping the chlorine and acid near each other :P

    memarchi - welcome to TFP!!

    The above advice is very good Whichever you decide to add first, let it circulate 1/2 - 1 hour before adding the other.

    As dman said - always use proper precaution when dealing with acid!

    I certainly hope that you can get the water balanced quickly so that your weekend party will go off without a hitch
    Luv& Luk
    -Ted

    Having done construction and service for 4 pool companies in 4 states starting in 1988, what I know about pools could fill a couple of books - what I don't know could fill a couple of libraries :-D

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    Butterfly's Avatar
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    Re: Can I add Acid and Chlorine at same time

    Quote Originally Posted by waste
    Quote Originally Posted by Butterfly
    Yep, what dmanb2b said. I would even say allow one hour of circulation between additions.

    Also, on this subject (sorta), store your MA away from your chlorine source.
    Example: I store my MA under the deck behind a brick pillar. It gets heat but not direct sunlight. I store my bleach in the garage.
    Now Joyce (Hi to you and Johnny by the way ), where on Earth did you hear about not keeping the chlorine and acid near each other :P
    I learned this from waste ( hi Ted ) a long time ago. MA and chlorine do NOT play well together and can do the ka-boom

    Also, I had the misfortune of adding MA too soon after DH added chlorine and got a whiff of the really bad nasty had-to-run-from-chlorine gas. That is dangerous. Period.

    Always use caution when adding chemicals.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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    Re: Can I add Acid and Chlorine at same time

    That stuff is nasty!!!

    I've been trying to get my TA down and every morning when I add the MA I'm in my yard with 1. sunglasses on (even though it's raining, 2. a tube winter scarf around my mouth and nose 3. garden gloves.

    Hope none of my neighbours have seen me
    21' 54" Round AG, 10K gallons,1HP 2 speed pump, Sand filter 200lb
    Have had a sparkling BBB pool all summer....

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    Re: Can I add Acid and Chlorine at same time

    Found this thread and was wondering about this. We just put in a new pool and I had been adding the MA first (mixing in a 5 gallon bucket for 30 seconds) then dumping into the pool and following that pretty closely up with the same process for my Chlorine. I recently had an FC of 3 and added enough to bring it up to 5 but when I checked in the morning my FC was only 3.5. It's not a true OCLT since I didn't measure the FC after an hour of adding my chemicals so I'm wondering if maybe the MA neutralized the CL?

    Pool 7700g
    Before Adding Chemicals 9:25PM
    PH: 7.8
    FC: 3
    CC: 0.5
    TA: 90
    CYA: 60ish

    My Targets
    PH: 7.3 (I'm trying to lower TA to 80)
    FC: 5
    TA: 80

    The PH dropped to 7.1 as of this morning and I began aerating to raise PH to 7.2. The FC was 3.5 surprisingly (CC < .5) when I expected it to be at least 4 (<1.0ppm drop). So either something is living in my water or the MA neutralized some of the chlorine? Water is clear.
    7700g IG pool/spa, Pentair IC20, Pentair Intelliflo VS, Pentair Whisperflo (Spa), Mastertemp 400k BTU NG, Pentair Load Center with i7 Personality Kit, Solar Pool Heater, Intellibrite 5g pool/spa, SpaCommand, Waterfall port, Two Firebowls

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    Pool Tool's Avatar
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    Re: Can I add Acid and Chlorine at same time

    MA won't neutralize FC, at least at an appreciable level from what you did. BTW, the bucket mixing of MA is generally not recommended as it just involves on more step for vapors to be released via mixing and affect you.

    If you have concern I would redo OCLT tonight properly. Additionally, I wouldn't blink at a 0.5 ppm difference in FC from expected unless its immediately following an addition. Good luck.
    16' x 32' (21100 gal), vinyl, 1.5 hp Hayward SuperPump,
    Tagelus TA60/60D Sand Filter, Raypak 399K Digital Heater, TF-100

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