The original question was the better of the two questions.
Is it ok to add muriatic acid while the pool is in use?
When is the best time to add muriatic acid?
You should either wait until no one is going to use the pool for a while. It is not a good idea to add chemicals to the pool while someone is in it. Best to add chem. first thing in a.m. before use - then let circulation distribute those chem.
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The shelf life of muriatic acid is unlimited in a tightly closed container.
Add acid, Muriatic acid works best but Dry Acid is also used.
You can't! Muriatic acid (~32% HCL) will not add any free chlorine to the pool and will not function as a oxidizer (Shock).
Yes, you can use muriatic acid to control pH in a pebbletec pool. Added correctly (spread around the pool with circulation equipment operating) muriatic acid will not harm the pool. As a matter of fact muriatic or hydrachloric is the best thing to use but I suggest you dilute it 4 parts water 1 part acid for safety to you and your equipment
None until you add it.
use either muriatic acid or dry acid (sodium bisulfate)
When mixing acid and water, always add the acid to the water, and add it slowly. Never add the water to the acid.
Hydrochloric acid is most commonly known as muriatic acid and is used to lower pH in pools
Add muriatic or hydrochloric acid.
NO!!! Never add them at the same time, together they make a toxic gas A general rule when adding chemicals to pools is to wait at least an hour before adding any other chemical to the pool. Remember Muriatic acid is very dangerous so be careful bad for lungs, burn skin, blind eyes.
Usually you would add muriatic acid to adjust the pools acid level.
Yes you can the muriati acid is used to get the pools pH to between 7.2 and 7.6 then you can add the pool shock as per the instructions.
You can add dry acid to your pool when your pH is above 7.8