So, we had iron stains and finally decided to get rid of them--brought our pH down to 7.2, FC to 0, added algaecide and then added ascorbic acid. Nearly stain free now!
However, we're nearly ready to close our pool (on our own this year!). Pool temperature is currently at 70, but I'm thinking that will go down soon because our nights are getting chilly finally. The instruction page on ascorbic acid says to wait two weeks before shocking your pool, and the page on closing says to shock before closing. But I also read one commenter claim he removed stains with this method shortly before closing.
Can we close sooner than two weeks? Otherwise, that puts us at closing mid to late October. But, I'd rather be safe than sorry if that's what you experts say.
PS--REALLY not happy Walmart cleared out chlorine in exchange of Christmas decorations already! I still need chlorine to close my pool!! What do you guys do that have year-round/ indoor pools?! I didn't know how much to buy ahead and have now run out because of the late summer.