+ Do not use non-chlorine shock. It's expensive, screws up your chemistry, and is only marginally effective.

+ Test your stains with Vitamin C tablets and with Iron Out. See if place tabs or a small pile of I-O will remove the stains. Let us know.

+ Check your fill water for phosphates. Most utility water has some added phosphates, but it's possible (if not likely) that well water might have it, too. Phosphates from farm fields? Not likely, unless you are ALSO getting a bunch of blown dirt and dust.

+ FYI, I just Googled "pool frogger" and didn't find anything with the word "frogger". I was assuming that you have the King Technology pool "FROG" feeder system?

+ As far as we can tell, people selling mineral systems ALWAYS say that the copper won't be a problem. Occasionally, they are even correct.

+ What is your stabilizer level? How did you test? Are you aware that test strip CYA measurements are usually HORRENDOUSLY inaccurate?