Product review (5 stars): Works fast
I have a 750 gallon pond which I am proud to say I setup myself.  I was disappointed when my water turned green from the sun. As I had no experience with this before I went searching for something to get rid of the green water. Came to Amazon and I found this, Laguna Clear Fast which really does clear fast.  It contains no harmful chemicals to hurt any of the animals that drink from the waterfall nor the birds that at times bathe also where the waterfall is.  Green water one day, crystal clear the next.  Easy to use and it works. Won't buy any other product except this one.