muriatic acid --

dash

Well-known member
May 14, 2017
50
Tempe, Arizona
I'm shopping at Home Depot and they have two types of muriatic acid. I think this bottle one is the 31.45%, but it doesn't say. The box of 2 gallons says 14.50%.

Is any one familiar with either type?

thanks
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
23,424
Laughlin, NV
The Klean Strip 'Green' will not be full strength. It should be 20%. So stronger than the 'pool' version.

I am still able to get full strength muriatic acid at our Home Depot in Bullhead City. It is typically next to the half strength stuff with the pool chems.

Hope that helps!
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
23,424
Laughlin, NV
The Lowes in Bullhead City only carries the half strength stuff. Same as you show you got at Home Depot.

Check Home Depot for the full strength, they have it here in Bullhead City, AZ. You can check their web page, pick the Home Depot you go to as the location. They will show if they have it in stock.
 

spinPHD

Well-known member
Apr 20, 2017
501
Phoenix
Dash,

The most reasonably priced full strength muriatic acid I have found in our area is at the pool store. Never could find it at hardware store here.

Leslie's has it but you need to ask them for it since they store it in back. Best price I found was $11.99 at a pool store called A&M Corsons for $11.99. They have several stores in the east valley.

On a side note, they also sell the refillable 12.5% liquid chlorine bottles by HASA. I use the HASA coupon for buy 3 get 1 free, so get 4 bottles for $11.99.
 

dash

Well-known member
May 14, 2017
50
Tempe, Arizona
Thanks everyone!
I went to another Home Depot, and they did carry the full strength. I bought 2 gallons for $12.98. The lady also gave me the SKU #346 289. If any stores carry the full strength it would be under that SKU.
 

pinguy

Well-known member
May 30, 2015
517
Pennsylvania
Thanks everyone!
I went to another Home Depot, and they did carry the full strength. I bought 2 gallons for $12.98. The lady also gave me the SKU #346 289. If any stores carry the full strength it would be under that SKU.
Zoom in on my pic, same SKU!! :D
 

spoonman

Well-known member
Jun 16, 2016
387
Peoria, AZ
Dash,

If you are interested , I highly recommend finding an independent pool store nearby that sells returnable cases of Hasa brand chlorine (12.5%) and muriatic acid (31.5%). The Hasa chemicals tend to be stronger (fresher as they're made in Tucson), come in cases of 4, and wastes less plastic. You can find a store on Hasa's website. I live over in Peoria and buy from a local store here. Works great.
 

dash

Well-known member
May 14, 2017
50
Tempe, Arizona
That's a great suggestion. I'll search around for some different pool stores.

I've been buying the liquid chlorine (2 gallon pack), KEMTEK from Frys Grocery, and it sells for $5.99 - my buddy said it's a good price and good quality.
 

dash

Well-known member
May 14, 2017
50
Tempe, Arizona
excellent, thanks for website.
I notice that I'll pour in some MA that pool math tells me to add and my pH will drop, but then a day(s) later I'll go check and the pH is way high again. Will I need to keep adding MA all the time, or is this just a summer thing, or is something else seriously off? I'm adding chlorine on the regular and I understood that it needed to be added pretty often, but the MA seems a bit more confusing to me.
 

spinPHD

Well-known member
Apr 20, 2017
501
Phoenix
excellent, thanks for website.
I notice that I'll pour in some MA that pool math tells me to add and my pH will drop, but then a day(s) later I'll go check and the pH is way high again. Will I need to keep adding MA all the time, or is this just a summer thing, or is something else seriously off? I'm adding chlorine on the regular and I understood that it needed to be added pretty often, but the MA seems a bit more confusing to me.
TA plays role in PH so lowering that should help. As you add MA to lower PH, TA will go down over time.

However, I will say that I have the exact same issue and I think a lot of it has to do with our fill water here in AZ. We are getting a lot of evaporation now, so we are adding new water that is high in TA. My TA is currently at 80, and still need to add MA every couple days. I'm trying to get it down to 60, since I have heard that is a good sweet spot to stabilize PH.

Aeration from water features like waterfalls as well as increased splashing play a role in PH rise as well.
 

tucsontico

LifeTime Supporter
Mar 30, 2014
255
Tucson, AZ
excellent, thanks for website.
I notice that I'll pour in some MA that pool math tells me to add and my pH will drop, but then a day(s) later I'll go check and the pH is way high again. Will I need to keep adding MA all the time, or is this just a summer thing, or is something else seriously off? I'm adding chlorine on the regular and I understood that it needed to be added pretty often, but the MA seems a bit more confusing to me.
Are you chlorinating with an SWG? Do you have a waterfall, spa or any type of feature that splashes into you pool? Either of these things will raise your pH due to aeration/carbonation effects. If not, check your TA and adjust it. If it is on the low end of the recommended range, raise TA or vice-versa. Every pool is different but TA acts as a pH buffer. Additionally, adding borates to your pool will also buffer pH. Here's a link to a PoolSchool article explaining how to lower TA and the effects I mentioned above. Pool School - Lower Total Alkalinity Good Luck!
 

dash

Well-known member
May 14, 2017
50
Tempe, Arizona
Thanks for the speedy reply. I don't have an SWG, but I was using a little aeration (for no good reason).
I just turned off the aeration and I'll add some MA shortly after that. Hopefully this pH can stay at a
reasonable level and stop shooting up so high.