Description
API® Stress Zyme™ is a natural aquarium cleaner that adds live beneficial bacteria to your tank, helping break down organic waste such as uneaten food, fish waste, and decaying plants. This biological process keeps your water clearer, reduces sludge buildup on gravel and filters, and improves the overall health of your aquarium.
Regular use of Stress Zyme™ enhances your biological filtration system, supports a stable ecosystem, and reduces the frequency of tank maintenance. It’s safe for all freshwater and saltwater aquariums and works continuously to keep your fish stress-free and your water healthy.
When to use:
During weekly maintenance and water changes
After cleaning filters or adding new fish
In both new and established aquariums
Use together with API® Quick Start™:
While API® Quick Start™ introduces nitrifying bacteria that instantly establish your aquarium’s biological filter to process harmful ammonia and nitrite, API® Stress Zyme™ adds waste-degrading bacteria that keep your water clean long term.
Used together, they create the perfect biological balance — Quick Start™ jumpstarts the cycle, and **Stress Zyme™ keeps it running smoothly.





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