Our Treatment Plant has abandoned any algaecide containing copper. We are now using a dry granular product called GreenClean Pro. This product kills algae and removes taste and odors. The byproduct of this product is water. The granules, when added to our raw water, turn into a hydrogen peroxide which attacks the algae. After it expends itself, the algae, taste, and odor are gone. We are always trying for better results with less complications.