metal stain

We closed our pool last year with some iron stains on the vinyl liner surfaces. We identified the stains as iron by using Vitamin C tablets. It was too late in the season to bring the pool to 0 FC and then wait to SLAM for closing. So we closed the pool and just opened it back up. After doing a...

Last season I had awful stains on the liner that at first I thought were worn spots on the liner, but it turns out they are metal stains. I tried to remove it with vitamin C and it came up. However, they are throughout the pool and a simple vitamin C tablet in a sock didn't fix the whole problem...

Hello TFPers, I recently re-finished a concrete floor with a Rust-Oleum epoxy kit and it came with two 1-lb. bags of anhydrous citric acid for etching the concrete. Do you think I could use this product in lieu of ascorbic acid for removing metal stains? If so, would 2-lbs. be enough to treat...

Hello TFPers, Can someone help me outright or point me to a guide on which Sequestering agent to use for which metal problem with respect to pool finish? I need to do an ascorbic acid treatment to get rid of some pale-brownish stains that are cropping up in my pool (confirmed not algae) and I...