Thanks Marie for the information.

When we opened the pool, I kept the chlorine level over 20, (usually over 25) for 5+ days. The stains that were obviously from leaves (in a nice leaf design on the bottom of the pool!) did brush off fairly easily.

However, the Kreepy tracks in the deep end didn't even fad. I'll try to scrub them with crushed up pucks and then try the vitamin C tablets. Can I just use regular vitamin C tablets? Do they need to be white? I think I've got some chewable orange-flavored ones. Now that I think about it, the chewable vitamin C would probably dissolve too quickly! Right?

Thanks for the help.

Marla