Bests & Worsts Reviews from Amazon

I have a smal/medium on the deck pond. Algae was a constant problem. We have several fish, so we couldn't use standard algae treatment. I found these in my research for healthy pond algae remedies. I put one in the waterfall reservoir, and hoped for the best. At first, the algae seemed to get worse. However, I left it in because the instructions say it takes several weeks to work. They were right! After 2 weeks the pond started to clear. Now, 4 weeks later, the pond is crystal clear. Not only that... the algae on the bottom rocks is also starting to break up. I highly recommend this product! We are happy to be able to see our fish!