We've used the barley bales in our pond/waterfall for the last three years but we decided that a liquid would work faster and we wouldn't have to take up some space in the water for the bale. We are in NW CT and the debris over the fall and winter can get bad but this makes all the difference.
The first treatment started to work right before our eyes. The debris on the rocks just started to lift off and in a couple days it was gone. Now on to maintenance and a clear pond!!
Lori from West Cornwall, CT