Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
I see 2 products available at HD sold as algaecides. The Becket product says "Safe for fish and plants" but the other one does not, in the description.
However, they seem to be the same active ingredient.
Further investigation of literature seems to me that the ingredients are NOT fish-safe, so I would not use either of these products to kill algae in a pond with fish.