Seachem Stability 500ml | Aquarium Biofilter Bacteria Starter for Freshwater & Marine Tanks

A biological aquarium conditioner designed to rapidly establish a stable biofilter and help prevent new tank syndrome.

Seachem Stability introduces beneficial bacteria that support the breakdown of waste organics, ammonia, nitrite and nitrate in both freshwater and marine aquariums.

Safe for fish, plants and invertebrates, it helps create a balanced and stable aquatic environment.

Key Benefits

• Rapidly establishes aquarium biofilter bacteria
• Helps prevent new tank syndrome
• Breaks down ammonia, nitrite and nitrate
• Safe for all aquatic life and plants
• Suitable for freshwater and marine systems
• Supports long-term aquarium stability

Who It’s For

• New aquarium setups
• Fish keepers cycling a tank
• Freshwater and marine aquariums

How to Use

• Shake well before use
• Turn off UV/ozone equipment before dosing
• Day 1 (new aquarium): Add 1 capful (5 mL) per 40 L (10 US gallons)
• Days 2–7: Add 1 capful (5 mL) per 80 L (20 US gallons) daily
• Fish and aquatic life may be introduced at any time during this period if dosing is maintained for 7 days
• For ongoing maintenance: add 1 capful per 80 L once a month, during water changes, when adding new fish, or after medicating
• For best results, use with biological filtration media such as Seachem Matrix

Why You’ll Love It

A trusted way to establish a healthy aquarium quickly and safely, helping protect fish while stabilising water quality from the very start.