First of all let me say hello to everyone! First time pool owner/poster to this site.
I've recently purchased a house w/ an above ground 20,000 gallon pool. Started the opening process a week ago and everything is going fine. Killed/removed all algae, water is clear,chemical numbers are all good. The only thing is the green stain on the walls and floor of the pool. Did the vitamin c test and it did clear the stain where the tablet was. My question, is there a way to clean the liner without draining the pool? Bought some metal free from Leslie's (which I am quickly learning to stay away from that place!!) that didn't do much of anything. Any suggestions??