I have iron stains on my pool floor and walls. It's not heavy unless you clear it off and notice the bright blue diamond bright underneath. I thought all along it was algae stains from over time when algae got away from me. I finally took some advice and used vitamin C tablets or Ascorbic acid. It removed the iron stains and left large clear circles; so I know it is iron stains. My pool man is suggesting using Salicylic acid. It says they use it to clean rust off of stuff hit by well sprinkler system. Which is how I got the iron in the pool to begin with. He also says that if you use this you do not need drop the chlorine. Pool will stay balance
Any ideas on using Salicylic. A friend of mine that worked for the city says just dropping PH will remove it. The acidic water will allow the stain to come off--maybe but I am betting that's time consuming.