Most "algae destroyer" brands contain either cyanide, copper, or arsenic.
Yes, all of these are toxic to fish too.


"'nutherBob" wrote in message
m...
I keep getting a lot of algea on my glass, even after faithfully and once
a
week water changes, once a month complete water change and "scrub". I
have
a plecky, and I was wondering using a algea destroying or treatment will
hurt the pleco in my cichlid tank.

'nutherBob