PH not going down after adding muriatic acid (MA)

drechslerta

New member
Apr 30, 2017
3
Temecula/CA
Hello

I am trying to lower TA per what I've read on the site. TA is 130 and I'm targeting 110. In my attempt to lower PH to 7.0-7.2, I have added 10-12 cups of MA. PH was 7.5-7.6 before adding MA. After waiting an hour or so, and re-testing PH, there is very little change.

Of note: I've added 1 gallon liquid chlorine today as well as Calcium chloride (25 lbs) to raise my CH level from 150 to 300 ppm. Also, in the summer months PH in my pool always tends to rise requiring frequent MA additions.

I'd prefer to get some input from the forum before continuing to add additional MA.

Thanks
 

Texas Splash

Mod Squad
TFP Expert
LifeTime Supporter
Muriatic acid is the weapon of choice for lowering pH and TA. To lower pH from 7.6 to 7.0 should take about 1 quart, 1 cup and 6 ounces of 31.45% strength (about 5 1/2 cups). Any chance you were using the 15% strength sold at some stores?

By the way .... welcome to TFP! :wave:
 

drechslerta

New member
Apr 30, 2017
3
Temecula/CA
yes...just under 15% :mad:....14.5% from home Depot. Can you recommend a place to find the stronger stuff ?

along the same topic...I use home depot 10% liquid chlorine....is there a better sanitizer I can use ?

Thanks...and I'm glad to have joined TFP
 

Texas Splash

Mod Squad
TFP Expert
LifeTime Supporter
If you're at HD, look for this:


If you're at Lowe's look for this:


Otherwise, you can just MA at the local pool store. :) That's where I get mine.

As for bleach, I just hit the local grocery store for regular/plain 8.25% bleach for about $2.94 a gallon. :)

Sometimes those MA bottles are in the paint dept at the big box stores.
 

Meadow

Well-known member
Jun 10, 2016
477
Temecula, CA
yes...just under 15% :mad:....14.5% from home Depot. Can you recommend a place to find the stronger stuff ?

along the same topic...I use home depot 10% liquid chlorine....is there a better sanitizer I can use ?

Thanks...and I'm glad to have joined TFP
I shop for MA (31.45%) at Leslie's in Temecula. If you do the math, they're reasonably cheaper than Lowe's or HD. Just don't let them sell you anything else. I have SWCG but I get the 10% liquid chlorine at Walmart when needed during cold season.

Our city water supply has TA of 125 ppm and CH of 175. I lowered my TA down to 50 ppm and it significantly reduced MA consumption.

Here's what I did to lower my TA https://www.troublefreepool.com/content/129-how-to-lower-lowering-total-alkalinity
 

triptyx

TFP Guide
Apr 12, 2016
1,495
Tucson, AZ
yes...just under 15% :mad:....14.5% from home Depot. Can you recommend a place to find the stronger stuff ?

along the same topic...I use home depot 10% liquid chlorine....is there a better sanitizer I can use ?

Thanks...and I'm glad to have joined TFP
Based on another poster's experience, California likes to "protect you" by not allowing Home Depot to sell the more concentrated stuff. This is one item you may want to check a pool store for. Just ignore their attempts to sell you other things. Repeat the mantra "Thank you sir, but I'm only here for muriatic acid today, I don't need anything else." over and over while you're in the store. :)
 

ping

TFP Expert
LifeTime Supporter
Jun 24, 2011
2,966
Long Beach, CA
Look for private pool stores, not chains stores, for acid and chlorine. In the Long Beach area those stores are cheaper than the big box stores and Leslie's. They buy it in bulk and have refillable containers that make it cheaper.
 

adeleincali

Well-known member
May 12, 2017
74
Temecula, CA
I shop for MA (31.45%) at Leslie's in Temecula. If you do the math, they're reasonably cheaper than Lowe's or HD. Just don't let them sell you anything else. I have SWCG but I get the 10% liquid chlorine at Walmart when needed during cold season.

Our city water supply has TA of 125 ppm and CH of 175. I lowered my TA down to 50 ppm and it significantly reduced MA consumption.

Here's what I did to lower my TA https://www.troublefreepool.com/content/129-how-to-lower-lowering-total-alkalinity
Hi Meadow! meadowview by chance?i live in RedHawk! Was just at Leslie's on 79,today, getting MA! Small work!
 

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