I noticed what appeared to be dirt at the bottom of my vinyl liner pool today. So, I tried to brush it off. Wasn't moving so I threw on the goggles and dove down. They are small stains that don't rub off with finger or brush (quickly trying as I can't stay down there for long!). I didn't know if there was a product or trick I could use to try to remove these. My pool was just built and brand new liner not even 2 months old so I'd hate to already have stains. I don't know if it is chemical that has sat down there or what. Any help would be greatly appreciated!