Active ingredient: Blend of aerobic, anaerobic and facultative bacteria, supplied in spore form
How to use (from the label): New tank: 5 mL per 40 L on day 1, then 5 mL per 80 L daily for 7 days. Maintenance: 5 mL per 80 L monthly or with each water change, new fish, or medication. Notes: shake well; turn UV/ozone off for the 7 days (at least 24 h for maintenance doses); most tanks still take 4-6 weeks to cycle fully
Careful: Harmless to aquatic organisms and plants; overdose very unlikely (worst case a temporary bacterial bloom)
Never mix medicines unless the label says it is safe, and remove shrimp and snails unless the label says they are safe.
Examples you may see in shops: Seachem Stability. Not endorsements. Always follow the label.
5 facts checked with sources