API Stress Zyme 120ml Aquarium Biological Filter Developer
API Stress Zyme improves the development of the biological filter and helps clean a dirty aquarium. It contains over 300 million live bacteria per teaspoon. Breaks down organic compounds that cause dangerous conditions such as ammonia and nitrite poisoning and low oxygen levels.
Continuous use ensures an active biological filter, cleaner aquarium, healthier fish, and good water quality. No refrigeration is necessary. Use when setting up and maintaining an aquarium. Suitable for both fresh and saltwater systems.
Purpose and Benefits
Stress Zyme is a biological filter additive containing live bacteria that improves the development of the biological filter and helps clean a dirty aquarium. The build-up of organic pollution in the aquarium inhibits the growth of nitrifying bacteria. Stress Zyme helps maintain a balanced and efficient biological filtration system.
| Key Features | Details |
|---|---|
| Active Bacteria Content | Over 300 million live bacteria per teaspoon |
| Usage | For fresh and saltwater aquariums |
| Storage | No refrigeration required |
| Application | Use during aquarium setup and routine maintenance |
FAQ
How long does it take to see results after adding Stress Zyme to the aquarium?
Results may vary depending on the condition of the aquarium, but users typically notice improved water clarity and reduced ammonia levels within a few days of consistent use.
Can Stress Zyme be used in both freshwater and saltwater tanks?
Yes, API Stress Zyme is suitable for both freshwater and saltwater aquariums.
Is refrigeration required to store Stress Zyme?
No, refrigeration is not necessary. The product can be stored at room temperature.

Lauren Terry –
I’ve used Stress Zyme for three months now and my tank has been much cleaner. Ammonia levels dropped quickly after the first week. My fish seem more active and the water looks clearer. Easy to add and works well with my existing filter setup.
Victoria Powell –
It helped stabilize my new aquarium during the cycling process. I added it weekly and noticed less fish waste buildup. The water quality improved noticeably after two weeks of regular use.
Jan Walsh –
Great product for both new and established tanks. I used it when setting up my saltwater tank and saw a significant improvement in biological filtration. No issues with compatibility or storage.
Jennifer Hudson –
Works well as a maintenance supplement. I mix it into the filter media and see better water clarity. Not a miracle fix, but it helps maintain balance in a busy tank.