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Thread: Muriatic Acid - Need to lower PH

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    Muriatic Acid - Need to lower PH

    I'm just a beginner, but I've read you can get MA at the hardware store.

    Home Depot it closest to me, though I see a lot of mention of Crown from Lowes.


    This from Home Depot (if it works) is 2 gallons for under $11. A better deal than lowes and it seems to be 20 Baume (31.45%)

    http://www.homedepot.com/p/Smart-2x1...specifications

    Anyone see any problems using this?
    13,000 gallons w/ spa (in-ground) | Plaster pool surface
    2.5HP Jandy Stealth Pump | CL580 Filter | Polaris 480 Pro w/ Halcyon Pump | 400,000 BTU Jandy LT | Jandy Aquapure 3PPM | Jandy PS4

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    Mod Squad JVTrain's Avatar
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    Re: Muriatic Acid - Need to lower PH

    That will work just fine. That's the concentrated stuff which is the most economical but use caution when handling and adding to pool.
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
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    Mod Squad tim5055's Avatar
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    Re: Muriatic Acid - Need to lower PH

    Quote Originally Posted by Mindflux View Post
    I'm just a beginner, but I've read you can get MA at the hardware store.

    Home Depot it closest to me, though I see a lot of mention of Crown from Lowes.


    This from Home Depot (if it works) is 2 gallons for under $11. A better deal than lowes and it seems to be 20 Baume (31.45%)

    http://www.homedepot.com/p/Smart-2x1...specifications

    Anyone see any problems using this?
    Nope - no problems, that is the stuff you want. At that price I'll have to go by HD as I normally use Lowes.

    Just remember, this is strong stuff. I don't wear gloves, but I do make sure I have glasses on. I open the bottle after I am kneeling next to the pool and partially submerge the bottle in the pool and pour from that position. This reduces the possibility of splashing on my clothes or the pool deck. I also don't measure. I guesstimate pour. I can always make it up tomorrow if I'm a little light on the MA. It has a very strong odor so I open and close at arms length and only leave it uncapped while pouring.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    Mod Squad jblizzle's Avatar
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    Re: Muriatic Acid - Need to lower PH

    If it is not half strength then that is a decent price and fine to use.
    Jason, TFP Moderator
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    Re: Muriatic Acid - Need to lower PH

    Quote Originally Posted by jblizzle View Post
    If it is not half strength then that is a decent price and fine to use.
    How would you tell? The bottle label suggests it's 31.45% which seems like the potent stuff.

    - - - Updated - - -

    Quote Originally Posted by tim5055 View Post
    Nope - no problems, that is the stuff you want. At that price I'll have to go by HD as I normally use Lowes.

    Just remember, this is strong stuff. I don't wear gloves, but I do make sure I have glasses on. I open the bottle after I am kneeling next to the pool and partially submerge the bottle in the pool and pour from that position. This reduces the possibility of splashing on my clothes or the pool deck. I also don't measure. I guesstimate pour. I can always make it up tomorrow if I'm a little light on the MA. It has a very strong odor so I open and close at arms length and only leave it uncapped while pouring.
    I'll keep this in mind. Seems like a good way to lose a full jug in a pool though but I understand the precaution.
    13,000 gallons w/ spa (in-ground) | Plaster pool surface
    2.5HP Jandy Stealth Pump | CL580 Filter | Polaris 480 Pro w/ Halcyon Pump | 400,000 BTU Jandy LT | Jandy Aquapure 3PPM | Jandy PS4

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    peterdaly's Avatar
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    Re: Muriatic Acid - Need to lower PH

    I hold my breath the whole time I have 31.45 open. Glasses, gloves, measuring cup. Strong stuff.
    Fayetteville, NY -17K gal, IG vinyl, Hayward SP2300VSP Max-Flo Variable Speed Pump, FlowVis Flow Meter, Sand filter
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    Mod Squad tim5055's Avatar
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    Re: Muriatic Acid - Need to lower PH

    Quote Originally Posted by peterdaly View Post
    I hold my breath the whole time I have 31.45 open. Glasses, gloves, measuring cup. Strong stuff.
    I agree! That is why I skip the measuring cup. Just one extra step while it is open to allow for spills.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    Re: Muriatic Acid - Need to lower PH

    I use these
    mask.jpg
    20K gal, IG vinyl, 1 1/2 HP Hayward Super Pump , 100lb sand, installed 2000 - new liner/filter/pump March 2014
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    Re: Muriatic Acid - Need to lower PH

    Quote Originally Posted by Mindflux View Post
    I'm just a beginner, but I've read you can get MA at the hardware store.

    Home Depot it closest to me, though I see a lot of mention of Crown from Lowes.


    This from Home Depot (if it works) is 2 gallons for under $11. A better deal than lowes and it seems to be 20 Baume (31.45%)

    http://www.homedepot.com/p/Smart-2x1...specifications

    Anyone see any problems using this?
    I use this and it works fine. When my pH is high I pour in a bit and the next day my pH is about where pool math says it should be.

    Just to reinforce the others: this is strong, nasty stuff in concentrated form. Please take precautions and wear your safety gear while dealing with it. Gloves and glasses at a minimum at my pool.
    25000 gal in ground plaster. '79 vintage. Cartridge filter.

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    Re: Muriatic Acid - Need to lower PH

    You should also store you MA well away from your chlorine. Never mix them it results in chlorine gas. I buy my MA at HD too.
    22k gallon IG pebblefina, Jandy 1.5 HP VS, Jandy CV Cartridge filter, Fafco solar panels, Polaris 360 supply side cleaner, waterfall

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    Re: Muriatic Acid - Need to lower PH

    Quote Originally Posted by gwegan View Post
    You should also store you MA well away from your chlorine. Never mix them it results in chlorine gas. I buy my MA at HD too.
    I have a SWG, so I don't think that'll be a problem. Thanks for the tip though!
    13,000 gallons w/ spa (in-ground) | Plaster pool surface
    2.5HP Jandy Stealth Pump | CL580 Filter | Polaris 480 Pro w/ Halcyon Pump | 400,000 BTU Jandy LT | Jandy Aquapure 3PPM | Jandy PS4

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    Re: Muriatic Acid - Need to lower PH

    Quote Originally Posted by astronaut888 View Post
    I use these
    Getting an attractive women to do it for you. Very smart.
    20,000 gal in-ground plaster pool with sand filter. Replastered recently. Mostly adding bleach and acid. CYA was high when I took over.

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    Mod Squad tim5055's Avatar
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    Re: Muriatic Acid - Need to lower PH

    Quote Originally Posted by SwimAustin View Post
    Getting an attractive women to do it for you. Very smart.
    I tried, the wive vetoed the pool girl idea....
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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