Started draining the water below the skimmer and noticed the liner and stairs all around the pool below the water level all tinted a yellowish-orange color. Crushed up some Vitamin C tablets in a sock and wiped the stains and they came away instantly, revealing a pretty big contrast with the clean areas that I never really noticed too much before.
My question is: Do I need to deal with this NOW? I really wanted to get it closed today for the Winter. I already did my partial drain, my chemicals are already in. I'd rather just deal with this in the Spring. Is there a good chance those stains will become permanent if I just let it alone?