Quote Originally Posted by tenax View Post
interesting..i have exactly the same thing from the sounds of it..a green stain all around the pool but not on the floor..it actually looks like 2 strips of stain and quite faint but obviously there..it's like at water level and goes down about say 5 inches, then it's like it's clear for about 6 then another one below. i too thought it was an algae stain..never had this before. i wonder if vinny has a chlorine generator as i've had the pool for 5 summers and this is the first year i've seen something like this (and first winter post using a chlorine generator. i always have a bit of algae to brush off and got most of it off but thought somehow it stained the liner permantly. i just happen to have a couple of magic brushes so i'll give that a whirl when i go swimming tomorrow and report back.
I don't have a chlorine generator, just use bleach, trichlor and cal hypo as needed.

Last year was the first time it happened, this is the second. It seems to be at the winter water level which was lower than I originally had it. Maybe some sunlight got through my winter cover ... who knows. Funny thing is my original winter cover gave out on it's second year and the pool was virtually uncovered all winter with no staining.

Other than being stained, liner has no other problems that I know of. I didn't have a chance today to get into the pool but maybe tomorrow.