Healthy Ponds 91160 Aquasphere Pro Pond Treatment, Treats up to 50,000 Gallons Natural bacteria and enzyme blend reduces excess nutrients, sludge and ammonia, resulting in improved water quality and clarity Treats up to 50,000 gallons Provides 24/7 water conditioning for 30 days Saves time and effort, with no mixing, measuring or mess Safe for humans, pets, fish, birds and plants