Hi, Yes I did mean CYA. Wish I would have read this before I tested CYA again this morning. OOPs. Anyway, Now that I seem to have my chlorine, PH, TA, and hardness in line, I need to attack my algae problem. My problem is severe. All, and I mean all of the liner is covered with green, black and a yellowish green algae. It does not come off unless vigorously scrubbed. I've been running my pool cleaner as much as possible with barely any headway made. In the past if I've had issues, I've used fairly inexpensive algae guards, mostly HTH, with good results. Now after reading things on the forum along with comments on this thread, I don't want to go headlong into buying anything. Any suggestions?
BTW, thanks so much for the input thus far.