SeaChem Stability 50 Ml
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 safe for all aquatic organisms and aquatic plants, with no risk of overuse.
Key Features
| Component | Function |
|---|---|
| Aerobic Bacteria | Breaks down ammonia and nitrite |
| Anaerobic Bacteria | Degradates organic waste |
| Facultative Bacteria | Supports nitrogen cycle stability |
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 Stability safe for fish and plants?
Yes, Stability is completely harmless to all aquatic organisms and aquatic plants.

Maria Harris –
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 fish died during the cycling process, which was a relief after previous failed attempts.
Molly Abraham –
The product worked perfectly in my marine tank. After adding Stability, the biofilter established faster than expected. I didn’t have to wait weeks for the nitrogen cycle to stabilize. The water clarity improved noticeably.
Joseph Knox –
Stability helped me cycle my tank without fish loss. The instructions were clear and the product is easy to mix. I still recommend it, though it’s not a complete replacement for regular water changes.