Extremely High TA and Ph

VargusAZ

Well-known member
May 29, 2020
137
Phoenix, AZ
Hello, since last year I have only been using liquid chlorine. Unfortunately, I did not track my Ph and TA and decided to check it for the summer and it is extremely high. TA was 400 and PH is 8.2. I tried about a gallon and half of Muriatic Acid I had from last year and after measuring a week later I am at 390 and 8.2. Any help will be appreciated. I am planning on getting more muriatic acid tomorrow. Thanks
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
44,351
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
Keep adding muriatic acid to lower the pH to 7.2 and aerate to raise it so you can add more.

TA has built up from adding water due to evaporation. Do you have scaling?
 

VargusAZ

Well-known member
May 29, 2020
137
Phoenix, AZ
Unfortunately I noticed some on the walls and I was going to submit another post on best tools/process to remove it. It's not too much but it starts to be visible on the water line. How much muriatic acid you think I should get. I need to figure out how to aerate.
 

VargusAZ

Well-known member
May 29, 2020
137
Phoenix, AZ
Pool calculator shows 2gal and 3 quarts to bring the pH from 8.2 to7.2 I may be at more than 8.2 since this is the max I can measure with the kit I have.
I can also aerate with the fountain/jets or the water bowls I have, correct?
Thanks
Keep adding muriatic acid to lower the pH to 7.2 and aerate to raise it so you can add more.

TA has built up from adding water due to evaporation. Do you have scaling?
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
44,351
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
If you have a place to store it, not in a garage or shed as the fumes will destroy nearby metals, I would say get 4 gallons to start. I keep my acid in a rubbermaid trash can (20 gallon) with a lid outside. Heat does not bother it.

Keep your scale discussion here. The high TA and pH are related to the scale.
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
44,351
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
Your signature says you have ordered the TF100. Do you have it now?
 

VargusAZ

Well-known member
May 29, 2020
137
Phoenix, AZ
Yes I do have the TF100. And yes my muriatic acid was stored in a black Rubbermaid trash can outside. Heat is definitely a factor but as you said it should not matter. I'll get the muriatci acid today.
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
44,351
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
Until your pH rises to 7.5 or higher. Then lower again to 7.2.
 

VargusAZ

Well-known member
May 29, 2020
137
Phoenix, AZ
So I have for the last couple of days tried to lower the TA using the Muriatic acid and aeration to bring the PH up. However I noticed a much more noticeable water line today (see attached the before and after picture). Is it normal? How do I take care of the water line and the walls? Can you also recommend a pool brush mine is falling apart and the last 3 I purchased did not last long.
 

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mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
44,351
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
I use a Whale Wall brush.
What you see if very normal evaporite scale at the waterline. Brush or scrub it off when you can. If left to build up, it gets more difficult to remove.
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
44,351
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
That is the brush. Works well.

Dilute acid and a brush. Wear eye protection. Get your CSI to below 0 as soon as you can.
 

VargusAZ

Well-known member
May 29, 2020
137
Phoenix, AZ
So I started with TA of 400 and PH of 8.2
Then I lowered it to TA200 and PH 7.5
And now it's at TA180 and PH 8.2

Seems like the PH keeps going up?!
Thoughts
 

MITBeta

Well-known member
May 28, 2020
371
North Attleboro, Massachusetts
Pool Size
13000
Surface
Vinyl
Chlorine
Liquid Chlorine
TA is still high. You need to keep bringing pH down and then when pH drifts up, lower it again. Each time you do, TA will come down, too. Eventually you'll get to a level where pH is more stable.
 
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Kevinr14

Silver Supporter
Mar 8, 2021
295
Chandler, AZ
Pool Size
15000
Surface
Plaster
Chlorine
Liquid Chlorine
So I started with TA of 400 and PH of 8.2
Then I lowered it to TA200 and PH 7.5
And now it's at TA180 and PH 8.2

Seems like the PH keeps going up?!
Thoughts

Keep at it. I find my ph is pretty stable when alkalinity is at 70. Stable meaning still need to add acid twice a week or so. That's just the nature of having high TA tap water as we do in the phoenix area. We're constantly increasing alkalinity every time we add water.
 
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