Oxy 2lb – Oxygen-Based Pond Cleaner – Helps Lift Debris & Organic Buildup from Surfaces – Safe for Fish, Plants & Wildlife

Have a pondless waterfall (rocks & boulders) that started forming black algae on the rocks. Used UltaClear Oxy as direct and was more than satisfied with the results. Started seeing a big difference two weeks after initial treatment. Previously tried a couple of "top rated" algaecides that did very little to reduce or prevent algae. Will definitely be using this product from now on.

Doesn't seem to work on small waterfalls with the small pond.

I expected that it would help keep algae at bay since it's an oxidizer but it had minimal effect.

The pond cleaner worked as advertised, I have no issues with this type of cleaner.

PERFECT FOR OUR COURT YARD FOUNTAIN