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I am new at this. How often can H2O2 be used to kill algae?

2191 Views 7 Replies 6 Participants Last post by  Gomer
Topic says it all.
How often can H2O2 be used to kill Algae.
Can it be used two weeks in a row before water change?
PS I know saltawater Reef tanks pretty good.

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This can kill fish, so err on the side of caution. I would not exceed 5ml/10 gallon. Actually I'd stop way short of that.

I've used H2O2 in a syringe at 1ml at a time to kill BBA. I stopped at 2 spots per day, 2 ml total. The 1/2" area hit would bubble away, and the areas near would die back and be attacked by shrimp. I would hit again several days later, I read in other sources that the effect of H2O2 can be in the tank for 2 or 3 days, so I'd wait that long to insure fish safety.

I read that consistent CO2 is what really does the trick on BBA, though.
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