Dry acid swim time

[Varelao95]

Hello just added 230z of dry acid to pool to lower PH how long should I wait until I can swim in it ?

Thanks a ton

 

[mknauss]

I would suggest you circulate the pool for 30 minutes and then test your pH to be sure it is above 7.2

In the future, it is much better for your equipment to use muriatic acid. Dry Acid is sodium bisulfate. The sulfates will destroy any metals in your pool system.

 

[spanman]

...it is much better for your equipment to use muriatic acid. Dry Acid is sodium bisulfate. The sulfates will destroy any metals in your pool system.

I'd recently begun using dry acid to lower pH in my 1,000 gal in-ground spa, and I've only used a few ounces of a 5 Lb container. But I now see that sulfate build-up is a concern. Is there any way to test for sulfate concentration in the water? In other words should I switch back to muriatic acid immediately, or could I use a bit more of that jug of pH Down before making the switch?

 

[mknauss]

If you change out the water often, it is not much of a concern. If not, then I would not use much of the dry acid. I do not know of a test for the sulfates that is available for a residential pool owner.