I'm guessing it wouldn't be too good for the fish , but I dunno, I've never triedit
if you have an algae situation try turning your lights off for about an hour in the middle of the day , gives the fish a nap-time and creates an
"algae gap", the results will amaze you
I tried the eSHa algae treatment. It is supposed not to harm plants but it didn't do them a power of good, I can tell you It helped the algae a little and my fish were unaffected.