Hello Pool People

With your CYA that high, the only way to get rid of the green is to shock the pool up to 25 ppm and hold it there until the pool clears up. Whatever form of chlorine you use is fine, except that I wouldn't use anything else with stabilizer in it....we really recommend plain, unscented bleach or liquid chlorine, as Yeggim suggested. The Polyquat isn't going to do much for you now, but you can use the dry acid to lower the pH til it's between 7.0 and 8.0 (do that before shocking the pool, because you'l get falsely high pH readings with very high chlorine levels).

I agree with Yeggim to not use the copper--we've already talked about why.

Janet

I had been using 6% bleach (about a gallon a day) thinking it would act as a shock and I wasn't getting anywhere. What will be different this time? My PH is 7.8 so I think it is good. The pool is not green it's just cloudy. I can only see about 8in down. I'm just vacumming and back washing.

"Shock" means to superchlorinate to high levels. "Shock" is not a product. You can use any form of chlorine to "shock" a pool except trichlor pucks. As long as you add enough to raise the cl to the appropriate level based on your CYA reading, you are "shocking" the pool. Perhaps you aren't adding a large enough dose of bleach at a time to reach shock level.
If you haven't already done so, take a look at the Best Guess table in my signature below.