API Stress Zyme Aquarium Cleaning Solution, 2-Pack 16 oz with Live Bacteria

API Stress Zyme is a bacterial aquarium cleaning solution for freshwater and saltwater tanks, supplied as two 16-ounce bottles and containing over 300 million live bacteria per teaspoonful.

• For freshwater and saltwater aquariums — use it in either type of tank.
• Over 300 million live bacteria per teaspoonful — adds beneficial bacteria to support aquarium cleanliness.
• Consumes sludge and organic debris — helps keep gravel and decorations clean.
• Supports the natural aquarium cycle and biological filter — helps maintain a healthy aquarium environment.
• Two 16-ounce bottles — provides the solution in a two-pack format.

Fish waste, uneaten food and other organic material can build up in an aquarium and become difficult to remove, especially from gravel, rock and coral. API Stress Zyme is made to help break down that debris as part of regular aquarium care, reducing maintenance over time while supporting a naturally balanced tank.

What does API Stress Zyme do in an aquarium?

API Stress Zyme’s live bacteria consume sludge and organic debris, helping keep gravel, glass and decorations clean. By adding beneficial bacteria, the solution also helps boost the aquarium’s natural cycle and maintain a strong biological filter. Organic buildup can contribute to poor water conditions, including ammonia and nitrite problems, so routine debris management is one part of aquarium upkeep.

• Works on organic material such as fish waste and uneaten food.
• Helps keep gravel and decorations clean and algae-free.

How often should I use API Stress Zyme?

Use API Stress Zyme weekly in freshwater or saltwater aquariums to support the biological filter and ongoing tank cleanliness. It can also be used when water or fish problems appear. Follow the product directions when using it as part of your aquarium routine.

• Suitable for routine weekly aquarium care.
• Can be used when water or fish problems appear.

What is included in this API Stress Zyme pack?

This pack contains two 16-ounce bottles of API Stress Zyme Freshwater and Saltwater Aquarium Cleaning Solution. The formula is intended for aquarium use in both freshwater and saltwater setups, including reef aquariums.

• Two bottles of aquarium cleaning solution.
• For freshwater, saltwater and reef aquariums.

API has created research-driven aquarium care solutions for over 50 years. This bacterial cleaner is suited to aquarium keepers who want to manage organic debris, support a biological filter and spend less time removing sludge from their tank. Its live bacteria work on aquarium waste and uneaten food in both freshwater and saltwater environments.