Just tested again - Cl dropped to 10-11 range by evening. Will add another 2 gal Chlorine tonight ~ want to keep it up in shock range until I'm sure that green is copper and not algae.

PH just tested 7.8, so it's coming down. Will add more acid now, then CL in about an hour.

Have posted on the metals forum as well, so will hope for an answer there soon.

Yes, Simmons, I used 2 qts of copper algaecide, one 5/23 and 5/26. The water's been green ever since, but it was very dark green two weeks ago and that I'm sure was algae. But I've put so much Chlorine in the pool these past two weeks, I don't know how any algae can still be alive in there!

Thanks!