I can't imagine you added enough copper to turn things green that quickly with dual action pucks. From your post it seems like you only used a few. More worrisome is using pucks in your skimmers, I know folks who have caused real hardware problems from "burning out" skimmers. I use Cal-Hypo (73%) to shock on opening. 15 pounds. Gets me to 50ppm. I keep CYA between 60 and 75. I open early (colder) and just don't think about anyone getting in the pool for 10 days at least. I find this the easiest and my CH always stays just fine, I use BBB completely otherwise. I think of shocking just like Z Pack. The nuclear option. I close with 25+ ppm and that CYA, figuring on keeping Cl until the temps drop. My pool has never been better since finding the Pool Forum.