I have been in the industry for about six years and just recently heard of using straight citric acid to remove stains on pool surfaces. I have spoken with multiple people who say that it works well, but obviously have no personal experience with the product. I would like to know the procedure for doing so (i.e. parameters necessary for successful treatment, one dose or multiple, effects on water chemistry and equipment, and post-treatment procedures).

Thank you.

I just pour it in there and it works right before my eyes. lol

Welcome to TFP.

Here's a link to a description of the process: ascorbic-treatment-to-rid-pool-of-metal-stains-t2298.html

When using citric acid, instead of ascorbic acid, you need to use about 1.5 to 2 times as much.

Thank you much...I don't plan on using the procedure myself, but nice to have the knowledge.