Bests & Worsts Reviews from Amazon

This works fantastic for my small 25 gallon pond with a small waterfall. It is in full sun all afternoon and the algae builds up really fast. I wanted something that would kill the algae but not hurt the wildlife. I have a lot of birds and squirrels that drink or bathe in the pond and also my dog will drink out of it. I have not seen any sick birds or squirrels and my dog is fine. Will definitely buy again!