I bought a house with a pool - and I had the pool open last year - the vinyl liner needs to be replaced as it has slight stains and it is old. However I used the pool last year and enjoyed it. When I opened it this year the liner had brown stains all over. I tested the water for metals and it came up clean - no metals. I put a Vitamin C tablet on the stain and it disappeared immediately. See pictures below of the stains.
I went to Leslie's and they suggested their stain remover which is basically Ascorbic acid - for $50! - followed by Metal Free to remove the metals from the water. After spending $80 I tried it - and as of this morning nothing (the photos are from after the treatment).
I can get Jack's Magic - however this will cost me hundreds as I have a 22,000 gallon pool. Any advice before I spend the money? I am looking for something to put in the water to make the stains go away all around the pool versus something I have to rub along the stained liner.
Any and all good advice would be appreciated. I have a water sample to bring into Leslie's for test results later today if that will help, however the latest tests show the water is in good shape.