Physan 20

Algae Control for Bird Baths, fountains and decorative ponds. Clean to remove algae growth prior to filling bird bath, founatin or pond by spraying all exposed surfaces with PHYSAN 20 solution. Allow to air dry; brush off the dead algae. DO NOT USE WITH FISH! USE: 2 tablespoons of PHYSAN 20 concentrate in 2 gallons of water to clean.