I believe if you check with pebble tech they will say never.
Pool acid typically refers to muriatic acid, which is a common acid used to lower the pH levels in swimming pools. The main ingredient is hydrochloric acid. It is important to handle muriatic acid with care as it is highly corrosive and should be diluted before adding it to the pool water.
Muratic acid or Sulfaric acid
add acid
Yes there should be no problem with that.
You should test your pool weekly at the very least and if there has been lots of rain or after a pool party. Liquid testing kits, strip testers, and digital testing kits are the main ways to test your pool water. You should test for total and free chlorine, pH, alkalinity, cyanuric acid, calcium hardness, phosphates, copper, and salt if you have a saltwater pool.
liquid pool acid is Muriatic acid or more commonly know as Hydrochloric acid (HCl)
Run the filter when adding any chemical to the pool. It needs to circulate to do its job.
If you are talking about acid washing an empty pool then yes you should be inside it to do it properly. It is best to hire someone who has done at least 50 acid washes. I have replastered many pools that were acid washed by an idiot or the pool owner because they simply didn't know what they were doing.
NO! You do not want to use Sulfuric Acid in a pool. That is battery acid and will burn you on contact. If is splashes back into your face or eyes you will be disfigured for life.=Use the products recommedede by the pool store in your area. I say this because not all areas require the same treatment.=
The hydrochloric acid is used for pool; this is a water solution of HCl.
acid is added to a pool when alkalinity is too high. Take a sample of pool water to your pool shop and have it tested by them. they will tell you what is required.
How much acid and chlorine should be added to a 5000 liter to make 5 ppm solution