Where does the muriatic acid that I put in my pool go to?

I've added, like 3 gallons, and the pH level keeps going back down.

Answers:
Of course the pH is going down. You are adding acid. Low pH is acidic. High pH is alkaline. So the more acid you add the lower the pH will be!

Other answers:
It might not be a problem with your muriatic acid it might be a problem with your pump. It might need to be checked. If you're still having problems ask your local pool supply store they can definatly help you. But if you're putting THAT much muriatic acid in it then there HAS to be something wrong with that pump. Also check if any base is getting into your pool somehow (used in a lot of cleaners) that can also affect the pH level.
It might not be a problem with your muriatic acid it might be a problem with your pump. It might need to be checked. If you're still having problems ask your local pool supply store they can definatly help you. But if you're putting THAT much muriatic acid in it then there HAS to be something wrong with that pump. Also check if any base is getting into your pool somehow (used in a lot of cleaners) that can also affect the pH level.
Go to Walmart and buy some PH-Up or PH Rise.

It is a powder form and has stabilizers to make it last.

Your pump won't change the chemical balance unless it isn't circulating the water and you would know if that was happening.
you need to contact your local pool supplier, I don't think muriatic acid goes in a pool I always used it to clean bricks
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