Tetra FilterActive 250ml – Biological Water Conditioner for Clear Aquariums
Tetra FilterActive 250ml is a highly effective biological water conditioner for aquariums. It contains specific bacterial cultures that break down harmful substances like ammonium and nitrites, ensuring a healthy aquarium environment.
Biological filter activation through beneficial bacteria – for fast and reliable water purification
Binds harmful substances and reduces algae growth – clearer water and less maintenance
Ideal for new setups, water changes and after medication treatment – supports the biological cycle
Easy dosing: 25 ml per 100 L of aquarium water – economical and effective
What sets Tetra FilterActive 250ml apart
Tetra FilterActive stands out with its concentrated bacterial formula, which enables particularly fast filter activation compared to conventional water conditioners. The bacterial cultures are stable and can be stored, maintaining their full effectiveness.
Ideal for...
Tetra FilterActive 250ml is ideal for aquarists setting up a new aquarium or wanting to support biological filtration after a water change. It also helps quickly restore a healthy water balance when treating fish diseases or after using medications.
How to use Tetra FilterActive 250ml
Add the recommended dose directly to the aquarium water. For best results, use FilterActive with every new setup and after every water change. Shake the bottle well before use. The bottle contains 250 ml, sufficient for up to 1000 L of aquarium water.
Tetra is a leading manufacturer of aquarium products with over 70 years of experience. The brand offers comprehensive solutions for water care, nutrition and technology in aquariums. Tetra products are known for their quality and reliability and are appreciated by aquarists worldwide.
Tetra FilterActive 250ml is a biological water conditioner for aquariums. It contains specific bacterial cultures that break down harmful substances and support biological filtration.
Tetra FilterActive 250ml is suitable for all freshwater aquariums. It can be used for both new setups and maintenance of existing aquariums.
The recommended dosage is 25 ml per 100 liters of aquarium water. Shake the bottle before use and add directly to the aquarium. Reapply after every water change.
The bacterial cultures start working immediately after addition. Harmful substances are broken down within hours, and full filter activation is achieved after 2–3 days.
Store Tetra FilterActive 250ml in a cool, dry place, preferably between 5 and 25 °C. Avoid direct sunlight. The product is stable for 24 months after opening.
Subscribe to the newsletter
New arrivals, promotions and exclusive offers — straight to your inbox.
Please complete your information below to login.
Sign In
Create New Account