What to do next? High Alkalinity & Combined Chlorine, Well Water & Iron issues

[madwil]

ok, if your CYA isn't reading, the dichlor is ok to use. the pucks, I wouldn't use because of the copper...
your pH is fine right now, so just hold on to the acid, soda, and borax for later when it's needed
add bleach- 1 gal will give you 6ppm in 10k gallons, so add enough for FC 2 to start, and add more later as needed.
As long as your pool stays clear, slowly get your FC up to maybe 5. I'd use the dichlor a little later, after you get some FC in with bleach first, then add CYA to get to 30ppm.

[CarlD]

I agree: Dichlor is a good option as it will add CYA as it chlorinates. It WILL tend to drive your pH down so be ready with Borax or lots of aeration to maintain.
I can't give you all the chemistry as to why Dichlor which is pH neutral, drives pH down anyway (but not nearly as fast as Tri-Chlor), but it has to do with chlorine in the water is acidic and dichlor doesn't counteract it.

Carl