API Stress-Zyme - 16oz API Stress-Zyme - 16oz is a freshwater and saltwater aquarium bacterial cleaning solution that helps maintain a cleaner aquarium and supports a strong biological filter when used weekly. API Stress-Zyme 16oz Bacterial Cleaner for Aquarium Maintenance API Stress-Zyme adds beneficial cleaning bacteria that help break down organic waste and support aquarium cleanliness. It is useful for established aquariums as part of a weekly maintenance routine and for new aquariums where the biological filter needs additional start-up support. Freshwater and Saltwater Biological Filter Support Freshwater and saltwater aquarium bacterial cleaning solution. Helps maintain a healthy, cleaner aquarium environment. Supports a strong biological filter when used regularly. Useful after water changes, during routine maintenance, and in new aquarium start-ups. Can be added while fish are in the aquarium. Works well alongside API Stress Coat for water conditioning and aquarium maintenance routines. 16oz bottle provides a practical size for repeated weekly dosing. API Stress-Zyme 16oz Aquarium Use Notes Product type: aquarium bacterial cleaning solution Size: 16oz Suitable for: freshwater and saltwater aquariums Use frequency: weekly for regular maintenance Start-up use: double dose at start-up and continue for 2 additional weeks Shake well before use API Stress-Zyme 16oz Dosing Directions Shake well before each use. Add 5 ml per 10 gallons of aquarium water weekly. For new aquariums or biological-filter support, double the dose at start-up. Continue using the start-up dose for 2 additional weeks. Resume weekly maintenance dosing after the start-up period. Use consistently with normal aquarium maintenance and water testing. What's Included One 16oz bottle of API Stress-Zyme