Okay, NOW I find one thread on the use of copper algaecide, well too late I used it. The pool store just kept recommending it. My cynauric acid level is 200 and I questioned getting that down first, but they kept saying do the copper first. Well I did, and then read more on it here. So I have used it, now what? Nothing noticed after a day and half, even the green is not quite gone, only a tad left. I am just concerned with the issue of the so called staining issue showing up, though I don't know what will stain.
Pool is 3 years old, gunite, med blue color, appx 18000 gal, Hayward media filter, 2 spd pump on high, great water circulation.