Makes tap water safe for fish by immediately neutralising harmful substances.
Creates a biologically active environment to allow the fast introduction of fish into a newly set up aquarium.
Tetra FilterActive adds highly effective live bacteria and thus promotes permanent biological activity in the aquarium.
Reduces the number of water changes and stabilises important water values for up to 6 months.
Tetra CrystalWater cleans dirt particles from the aquarium water fast, safely and reliably. For crystal clear aquarium water.
Tetra NitrateMinus reduces the algae nutrient nitrate (NO3-) reliably and in a natural way.