I was finally able to vacuum yesterday. I backwashed well and drained approx 6" of water. Went today and bought LOTS of bleach and had my water tested at the pool store, mostly to check the metals and cya. My test kit was shipped yesterday so I am hoping it will be here mon or tues. I think I know what to do but want to run it by the experts!! I plan to add bleach based on my current cya and fc to bring it up to at least 5, till I get my kit, and then test, including an overnight fc loss, and then shock if my fc loss is >1ppm. Correct?
Anyhow, my numbers from the store are:
If you beleave their numbers I was able to get rid of the iron (.76) from last week and some of the copper (down from 0.57).
My question is, I have a bought a metal sequestering agent and it has the phosphonic acid as jason mentioned, but it states to not shock within 7 days of using it. Since anything > 0.3 is a problem, should I use it and not shock for a week? If I do that my probable existing algae will have taken over by then!!
Or, I could drain some more and hope to get rid of the rest of it. Truthfully yesterday I did not see any type of a waterline/stain when I drained. If I drain more I will probably need to bring my ta and ph up some.