I picked up a new bottle recently at the local PaP, same percentage as always but a different brand. I noticed it doesn't smell nearly as strong and I believe it's not dropping the PH near as much as it should based on Pool Math.
Does Muriatic Acid ever go bad?
- Thread starter FloridaPoolNewbie
- Start date
You may have perchased the "lower strength" green stuff.....which means you have to use twice as much to get the pH adjusted.
What is the percentage?
Maddie
What is the percentage?
Maddie
- Jun 24, 2021
- 8,376
- Pool Size
- 30000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-60
There are two circumstances under which an acid would lose potency upon long storage:
Acids in a sealed container with no contaminants with which to react, will remain at constant "strength".
- The acid is a gas under standard conditions and has been dissolved in a solvent for ease of use. If the container is not well-sealed, some of the acid (which has its own vapor pressure independent of the solvent) will escape over time.
- The acid reacts with something to which it is exposed in its storage environment. This could include the container, ambient humidity (water), air, solvent, itself in some cases, anything with which it is in contact.
Acids in a sealed container with no contaminants with which to react, will remain at constant "strength".
This season was at a pool that needed MA and I had non with me. In this guy's pool shed I found a new unopened jug from beginning of last season. To my surprise it worked perfectly being over a year old.
Last edited:
31.45, same as the other stuff. So as an example, last night I had PH of 8.2. I added 7 oz to get down to 7.5 PH, this morning it was 7.7.You may have perchased the "lower strength" green stuff.....which means you have to use twice as much to get the pH adjusted.
What is the percentage?
Maddie