Seachem Stability

$2.96 ~~$4.49~~ In stock

Stability will rapidly and safely establish the aquarium biofilter in freshwater and marine systems, thereby preventing the #1 cause of fish death: "new tank syndrome". Stability is formulated specifically for the aquarium and contains a synergistic blend of aerobic, anaerobic, and facultative bacteria which facilitate the breakdown of waste organics, ammonia, nitrite, and nitrate. The bacteria employed by Stability are non-sulfur fixing and will not produce toxic hydrogen sulfide. Stability is completely harmless to all aquatic organisms as well as aquatic plants, thus there is no danger of over use.

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Customer Reviews (5.0 / 5 · 4 reviews)

Alexander ★★★★★ Oct 21, 2026

I was skeptical about adding bacteria to a brand new marine tank, but after a week of dosing, my ammonia and nitrite readings finally hit zero without a single fish loss. The fact that it works for both freshwater and saltwater setups made it a no-brainer for my nano reef.

John I. ★★★★★ Oct 20, 2026

My 55-gallon freshwater cycle crashed after a water change, and this had my ammonia levels back to zero within a week. The bacteria seem to establish much faster than any other bottled bacteria I've tried. Definitely saved me from losing my cichlids.

Alexander ★★★★★ Oct 19, 2026

I set up a 20-gallon saltwater tank and added this right after the live rock; the ammonia never even spiked past 0.5 before dropping to zero in four days. It handled the freshwater-to-marine switch without a hitch, and my clownfish stayed calm the whole time.