I have read through the basics and have a few questions from you experts, as i'm not too confident in the pool store people.
FC - Off the Charts ( not sure if its FC / TC, it is what is on the attached tester picture
CC or TC - Combined Chlorine or Total Chlorine
pH - off the charts as well
TA - 270 (down from 350)
CH - No hardness
CYA - Reading 0
I setup the pool 3 days ago, hyper chlorinated to above 6 PPM, then then later that night started on the dichlor as in your guide. On the 3rd day, started to appear slightly green/ yellow, pool store said it was metals in water (used well to fill it). I used some metal remover they gave me and put in ph(-) as directed. The TA came down, but everything else stayed about the same.