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Vallisneria sensitive to H2O2?


Mychala
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I treated with 3% hydrogen peroxide on Sunday for algae and my vals are looking rough. This isn't the first time I've used H202 but I usually just use it as a spot treatment. I followed Irene's instructions on 1 tablespoon per 10 gallons and let sit with lights off and filters off for an hour.  Is it the peroxide or a deficiency?

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I have the same question about Hornwort as well. 

I put a  clump of Hornwort in my Barb tank and it seemed to be doing well  Two days after a peroxide treatment, the plant was naked except for a single tuft at the top.

The Hornwort in my  planted tank (also treated) is also suffering, but the newly planted Italian Val has only lost three of it's original leaves, and is putting out runners.

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