SeaChem Stability 500 Milliliter
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 do not produce toxic hydrogen sulfide.
Stability 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 | Degrades organic waste in low-oxygen environments |
| Facultative Bacteria | Adapts to varying oxygen levels and supports overall filtration |
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.

Deirdre Martin –
I’ve used Stability in my 55-gallon freshwater tank for three months. The water parameters stabilized quickly, and my fish showed no signs of stress. No ammonia spikes, and the filter seems to work much more efficiently now.
Ryan North –
After setting up a new marine tank, I added Stability to help establish the biofilter. Within two weeks, nitrite levels dropped to zero. My corals and fish are thriving. No bad odors or fish deaths.
Tim Manning –
Stability worked well in my freshwater system. It took a bit longer than expected to see results, but after two weeks, the ammonia levels were stable. I’m happy with the product and would recommend it.