Healthy Ponds 51117 Aquasphere Pro Biodegradable Pond Treatment 3-Pack, Each Sphere Treats up to 1,000 Gallons

This 4-inch sphere is preloaded with a natural bacteria and enzyme blend which reduces excess nutrients, sludge and ammonia, resulting in improved water quality and clarity. A patented timed-release system incubates and releases beneficial bacteria and enzymes 24 hours a day, 7-day a week, over a 30-day period. Each sphere treats up to 1,000-gallon (to calculate pond volume in-gallon, multiply pond length x width x average depth x 7.5). Being all-natural, you can't overtreat. PRO formula works effectively in water from 34 to 110F. Ideal for stock tanks, koi ponds and small ponds. Safe for humans, pets, fish and plants. Made from a corn-based polymer; after 30-day, sphere can be disposed of or composted. Replace every 30-day. May require 4-6 weeks to achieve water quality improvement. Most effective in ponds with pH level between 6.0 and 8.5. Includes string for easy retrieval. Disclaimer: Molded from resins that have been certified compostable to the requirements of ASTM D6400 and shown to be marine degradable per the requirements of ASTM D7081. Made in USA.