Product reviews for Decorative Fountain Algae Control

I have used this in a D.I.Y. Bird bath made from a 5 gallon ceramic flower pot, a water catch basin, and a metal bowl with a hole drilled in the metal bowl and the basin to run tubing from the pot up to a fountain head that I turned into a 6 hole down spraying fixture.  I put the algae control into the cap of the algae bottle up to  the bottom most thread into a gallon of tap water or more, depending how much water has been used since the last fill the day before.  Keeps the algae under good control.