SeaChem Stability 4 Liter
Stability rapidly and safely establishes the aquarium biofilter in both freshwater and marine systems, preventing new tank syndrome—the leading cause of fish death.
Formulated specifically for aquarium use, Stability contains a synergistic blend of aerobic, anaerobic, and facultative bacteria that help break down waste organics, ammonia, nitrite, and nitrate.
Unlike other products, the bacteria in Stability are non-sulfur fixing and will not produce toxic hydrogen sulfide. It is completely harmless to all aquatic organisms and aquatic plants, making overuse safe.
Key Features
| Component | Detail |
|---|---|
| Bacterial Types | Aerobic, anaerobic, facultative |
| Targets | Ammonia, nitrite, nitrate, waste organics |
| Safe for | Marine and freshwater systems, aquatic plants, fish |
| Non-sulfur fixing | No hydrogen sulfide production |
FAQ
Can Stability be used in both freshwater and marine aquariums?
Yes, Stability is formulated for use in both freshwater and marine aquarium systems.
Does Stability produce hydrogen sulfide?
No, the bacteria in Stability are non-sulfur fixing and will not produce toxic hydrogen sulfide.
Is it safe to overuse Stability?
Yes, Stability is completely harmless to aquatic organisms and plants, so overuse poses no risk.

Bella Ogden –
I’ve used Stability in my 55-gallon freshwater tank and noticed a significant improvement in water quality within a week. My fish showed no signs of stress, and ammonia levels dropped quickly. No bad odors or sulfide issues. Highly recommend for new tanks.
Melanie Ferguson –
After setting up a marine tank, I added Stability to jumpstart the biological filter. It worked faster than expected. My nitrite levels stabilized within 5 days. The product is easy to mix and safe for all fish species.
Jane McGrath –
Stability helped me avoid new tank syndrome. The bacteria blend is effective, though it took a bit longer than advertised in my case. Still, it’s a reliable product for establishing a healthy biofilter.