Dry acid

[sroth36]

How long after adding can we swim?
It’s a 24 ft round, I added 2 cups.

 

[PoolStored]

30 minutes.

Please do not use dry acid in a pool. They add sulfates, when are no bueno for el poolo. Use muriatic acid.

Recommended Pool Chemicals

Which should I buy? TFP's recommended pool chemicals are cheap, easy, and won't unbalance your pool water.

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[ferk78]

How long after adding can we swim?
It’s a 24 ft round, I added 2 cups.

As PoolStored said
Watch out on the residuals from dry acid.
It can damage your pool:

Sulfuric Acid, Sodium Bisulfate & CO2 | Muriatic Acid Alternatives

When muriatic acid is unavailable, sulfuric acid or sodium bisulfate can be used to reduce pH and lower alkalinity in a pool. But beware of sulfates! Muriatic Acid Alternatives

blog.orendatech.com

I used to buy dry acid but then changed to Muriatic acid 4 good.

And always dilute muriatic acid in a bucket before pouring to the pool.
There are some pictures showing how pool plaster gets attacked when pouring directly at arms length (leaving discoloration exactly at arms length!)

 

[kellyfair]

I would not dilute MA. Just pour it slowly in front of a return.

 

[ferk78]

I would not dilute MA. Just pour it slowly in front of a return.

Is there any problem with diluting the muriatic acid? I could not find any negative effect.

 

[duraleigh]

I could not find any negative effect.

The less you handle muriatic, the less chance for a spill

 

[mknauss]

Is there any problem with diluting the muriatic acid? I could not find any negative effect.

You are handling it twice. Increases risk to spill it. Simply pour at a slow rate at the return into the pool with the pump running. If you wish, brush the area afterwards.

 

[kellyfair]

Is there any problem with diluting the muriatic acid? I could not find any negative effect.

It’s not that it harms the MA, it’s just that the more you handle the more chance you have of inadvertently splashing on you, breathing the fumes, etc.

 

[kellyfair]

Oops, we were all replying at same time!