I know I have seen advertisements for preventing or removing the iron from well water for irrigation systems, but now when I want to find them, I can't! Have a potential customer that just put in new sidewalks and they don't want them stained, and guess what, there water has lots of iron in it. I know they have systems to remove iron for the whole house by Culligan, etc. and I believe they have them for just the sprinkler system. Who sells them, and more importantly, have any of you guys used them, and if so, how well do they work? Thanks & happy 4th of July!!