@markayash -- I'm actually in Fayette -- I just use the Atlanta, GA location because I don't want to be too specific on the internet. I've asked on my local Facebook town page if anyone else has iron staining issues.
Oh wow, 10 lbs? I used 3 lbs of AA, and that got all of the staining up, it's just that it keeps coming back. I've added 2.5 qts of purple stuff at the initial treatment, and then three days later added another 1/2 qt, and then if I wasn't about to SLAM, then I'd add another 1/2 qt today. I read on another post here how someone had to do 8 qts of purple stuff, so maybe mine isn't so bad, it just feels that way.
Just talked to the husband about it, and he votes to drain the pool after the season is over. So, I'm headed for a SLAM today. We've had the ladder out of the pool to get it good and clean, but if I'm going to SLAM, then I'm gonna put that sucker back in so that all the nooks and crannies get clean for sure.
Thanks, everyone.