Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Doesn't work, no more birds :(

Bought this because of the good reviews, and b/c with so many products out there to choose from, I tend to trust amazon & others experiences. I have a small 5-7 gallon outside fountain in direct sun most of the day. I used just a bit more product than recommended due to others comments. It made the water cloudy in the fountain, and did not get rid of the algae on the walls/bowls of the fountain. The worst & saddest part though, is that I got this b/c it's supposed to be animal friendly. Well, birds are no longer coming & playing in the fountain- and that's the whole reason I have one- to attract wildlife. Guess I'll be draining out the water & refilling, hoping that the birds will come back. Seems like this product is hit or miss. Works for some, not for others. Maybe if I used ALOT more it would have cleared the algae, but if I have to choose birds or algae, I'll choose birds, and continue the search for another product.