I bought some vitamin C pills, jumped in, held one against the wall and wow what a difference.

Just holding the pill under my finger and moving it along the wall cleaned the liner, now that area is bright blue like it should be. it does make sense, i do have a well and over the past 3 years we've had the pool have had to top off the level.

so that probably means i need to clean everything, the walls and the bottom. Any recommendation on a solution and a tool to make that a bit easier?

do i then also need to worry about the stains that are lifted off the walls?

From reading some of the other posts i bought a CuLater pack, it's in, we'll see if it turns colors.