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

[aylad]

I would STRONGLY recommend against using Tri-Chlor puck given a pH of 6.9. It's asking for trouble. Now is the time to rely on bleach and aeration.

I agree with this--if the trichlor pucks drive your pH down, then it won't rise enough to let you make any progress on your alk. Stick with bleach and aeration.

Janet