I was following the instructions in one of Ben's post (which I can't seem to find now) for treating iron stains. Everything was going fine for the first 7 days, but then today the pool turned green. Obviously, something has gone wrong and I'm not sure what it is. Here's what I did:

7 days ago:
(33000 gals, vinyl-lined)
TC = 2
CC = 0
CYA = 50
pH = 7.2
TA = 70
Temp. = 80

Added a full dose of polyquat and waited ~4 hours. Added recommended dose of "Metal Free". Wiped entire pool with Vitamin C tablets enclosed in a mesh bag. I figured this way, it would get the Vitamin C right on the stains and therefore require less. Anyway, the stains lifted off beautifully and the pool was crystal clear.

As expected, CL levels went to 0. Per Ben's instructions I kept the CL level low the entire week, however, I did add bleach sometimes 4 times a day to try to bring it up to around 2.5. Also per Ben's instructions, I added a little Borax to gradually bring the pH up. His instructions said to bring it to 7.8, but I never made it that far, I did get it to 7.6

Day 4:
Notice a slight hint of brown returning to the pool. The wife couldn't see it, but I could. Added what little "Metal Free' I had left (about 1/3 bottle).

Day 7:
Morning: CL equaled 1, so I added 2 gals bleach which in my pool should raise CL by about 3. I figured at this point I could start trying to get the CL up.
Around noon: Checked CL again. Still around 1.5. Added 2 more gals. bleach. Shortly afterwards, the pool started to turn green. Added another dose of Polyquat.

So that's where I am now. The pool is green, and it is still not holding CL. So the question is, what do I do now? And, what did I do wrong? Should I go ahead and start shocking, or will that just cause the stains to return?

Current readings:
TC = 2
CC = .5
CYA = 50
pH = 7.6
TA = 70
Temp. = 83

Of course, any help is most appreciated.

Bobby C.