Healthy Ponds All Purpose Water Cleaner 10 is a water maintenance product designed to keep bird baths, fish bowls and water features up to 10 gallons clean, clear and free of green organic growth. The Healthy Ponds unique patented time-release system delivers a proprietary blend of naturally occurring bacteria and enzymes into the water for 15 days. This easy to use, all natural product is veterinarian approved and safe for fish, plants, birds, animals and humans. Correcting water problems naturally occurs with time and continued use. Every water feature is different, therefore results may vary. Over time, the bacteria and enzymes will work to reduce organic debris found in water. With continued use of Healthy Ponds products, you can expect to improve and maintain water quality and clarity, while eliminating odor. Includes 6 preloaded dispensers. Each dispenser treats up to 10 gallons for 15 days.