Dry Acid Concrete Stains

buckethead

New member
May 31, 2022
3
Hazlet, NJ
Hello, while dissolving dry acid in a bucket to add to the pool I noticed some has spilled in small drops that have stained my concrete and stone. Is dry acid on concrete and stone a permanent stain or is there a product that can help me remove it? Thank you
 
I'm going to say it's a permanent stain.

I suggest you switch ot muratic acid for pH control. No mixing, pour straight from the jug.

Here is a post that talks about using dry acid and the sulfates that build up in the water from it's use.


Now, using muratic acid -

Safety first. Wear old clothes and eye protection.

I like to get in front of a return on my hands & knees and splash a little water on the pool deck. Then open the acid bottle and partially submerge it in the water. Tilt the bottle to pour the acid in at close to water level, but don't let the bottle get submerged.

I don't measure what I pour because it's an additional step for me to spill the stuff.

Remove the bottle from the water and set it down in the puddle on the pool deck while you replace the cap.

Try not to breathe the fumes..

Guess a little low on amount you need, then test again after it circulates well. You can always add more.
 
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