Went to a home center today buy some algaecide for my pond and the main ingredient was hydrogen peroxide $15.00 for a pint. Immediately put it back because a quart of hydrogen peroxide is.99. So I put 100 ml in my pond today. Waiting to see what the results are. Over the past 20 years have spent a small fortune on algaecide. Any one else try this. I am assuming it will not harm the pond which contains plants and goldfish