Quote Originally Posted by PoolDoc View Post
Normally, I suggest keeping it elevated a day or 2 AFTER all traces of algae are gone.
Hmmm... Very non-specific ;-) How do I know when ALL TRACES of algae are gone? I have to say that it has felt gone before and it came back again... and again... and again... and... well, you get the picture. It appears that most, if not all of it SEEMS to be gone. So maybe I will keep high until next weekend, then slowly let it drop to it's Best Guess level.

In other words: Nuke the site from orbit. It's the only way to be sure. :-D