I need to treat our pool for iron. What is the best way to do this and how long will the pool be out of commission? I have noticed our steps are stained with what appears to be iron. We have a 30,000 gallon inground pool with a vinyl liner and sand filter.
I have no firsthand experience to offer, but I've seen enough posts to know there is a wealth of information here.
Try the search function, it's upper left next to where you log out. Try "iron" or "jack's magic" or "sequestrant" or "ascorbic acid". You'll get hundreds of hits. That ought to keep you busy for a few hours.