Q&A for How to Acid Wash a Swimming Pool

Quickly drain it off. The acid will be stuck on the walls. Clean it and pour the water.

Depending on how much acid you added and if your filter is moving the water rapidly about a hour, check with your test kit (phenol red), it will let you know the acid level. I add a bit less than calculated and then adjust further in small doses, that saves money. Note: you should retest next day as some cement/concrete pools react with acid causing a small pH bounce.

If the dirt disappears, it's working.

You may need additional people to help. If the pool is empty, prompt and quick cleanup of puddles and timing of soak are necessary. One person should do all of each area as strength, soak time, time of day, wind and temperature affect the job and work speed and consistency are needed.

No, because it is fiber and may break, so use a wet cloth to clean it.

It is the same. Just note, using acid will remove some of the material, thus reducing the life of your surface. Perform an acid wash only if you have scale on the walls. I’d strongly suggest not performing a wash for algae, as chlorine will take care of that problem.