- Contains one (1) API POND-ZYME SLUDGE DESTROYER Pond Cleaner With Natural Pond Bacteria And Barley, 1-Pound Container
- Contains natural active ingredients to break down fish waste and consume pond sludge
- Breaks down dead algae and digests leaves and grass clippings
- Helps to reduce overall pond maintenance and keep pond clean
- Use twice a week for two weeks in ornamental ponds for start-up, end of season, then once every two weeks for regular maintenance
From the manufacturer


Why be proactive with water treatments?
A natural pond has a constant supply of fresh water flowing into it, such as from a stream or spring. Water also flows out of a natural pond, taking fish waste and other toxins with it. This isn’t true for most garden ponds as they are closed systems. Garden ponds also tend to be much smaller than natural ponds, so they do not offer the amount of water per fish that you find in nature. For these reasons, water treatments are necessary to keep water conditions safe for both fish and plant life and for clearer water.
Following specific steps each season allows you to create a backyard retreat you’ll enjoy all year long! For more information about what’s needed each season, check out more below.

Spring Start Up – Get Your Pond Ready!
It’s pond startup time! Whether filling a new pond or re-establishing an existing pond, following some simple steps at startup will yield benefits you’ll enjoy all season long. The 3 key steps that must be taken are making your tap water safe, activating the natural pond cycle, and maintaining sparkling clean water to boost fish and plant health. Once the water temperature reaches above 42⁰F, you’ll also want to start feeding your fish again. It is important to take care of all of your plants in the spring with API AQUATIC PLANT FOOD TABLETS as they will be the key to success in most ponds! Lastly, monitor the water conditions in your pond with the API POND MASTER TEST KIT, an easy and accurate way to test 4 key water parameters including pH, ammonia, nitrite, and phosphate.




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API POND MASTER TEST KIT | API POND ALGAEFIX | API POND ACCU-CLEAR | API POND ECOFIX | API POND-ZYME | API POND STRESS COAT | |
Use Weekly | Helps monitor water quality | Controls algae growth | Quickly clears pond water | |||
Use Every 2 Weeks | Breaks down sludge | Consumes pond sludge to keep it clean | ||||
Use When Adding or Changing Water | Makes tap water safe for fish | |||||
Treatment Season | Spring – Autumn | Spring – Autumn | Spring – Autumn | Summer & Autumn | Summer & Autumn | Spring – Autumn |

Making A Better Underwater World
At API, we understand the rewards and relaxation of fishkeeping because we have a passion for fish too. For over 50 years API has developed premium solutions with proven and effective results for your family and ours. API offers a range of testing kits, water conditioners, and nutritionally superior food, because we’re dedicated to making a better underwater world.
Product Description
API POND-ZYME SLUDGE DESTROYER Pond Water Cleaner with Barley reduces build-up of fish waste and consumes pond sludge, which is typically a build-up of organic matter that degrades water quality and clogs pumps and filters. POND-ZYME SLUDGE DESTROYER uses natural bacteria and barley as active ingredients to break down algae and fish waste, digest leaves and grass clippings, and reduce overall pond maintenance for the season. This product is exclusively for use in ornamental ponds. Use as directed, dosing twice a week for two weeks at the beginning of the spring start-up season and at the end of the season, and dosing once every two weeks for regular maintenance. With API POND products, it’s easy to keep a beautiful pond. For almost 60 years API has developed premium solutions with proven and effective results for your family and ours. API offers a range of testing kits, water conditioners, and nutritionally superior food, because we’re dedicated to making a better underwater world. They work to provide a safe, hospitable environment for fish such as koi, catfish, perch, goldfish and more. At API, we understand the rewards and relaxation of fishkeeping because we have a passion for fish too.
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