Algae-Off Pond Algaecide (CC074-2-S)
Algae-Off is a safe and effective, non-copper based algaecide for algae control
Just As Good
I've tried a couple of these noncopper algae killers and this one works pretty good. It's cheaper than some of the other one's I've used. I mainly use it for my waterfall area, on the rocks and such, and it kills the algae that's there. It'll grow back after a time but it's easy enough to treat again if necessary.