Tetra SafeStart creates a biologically active environment to allow the fast introduction of fish into a newly set up aquarium.+ Tetra SafeStart contains specially bred, living nitrifying bacteria that substantially reduce harmful ammonia and nitrite in tanks+ reduces the ammonia content by up to fourteenfold and the nitrite content by up to tenfold+ can be used when setting up a new aquarium, as well as after use of medicinal products and after every water change+ an ideal combination with SafeStart is AquaSafe, which establishes an ideal environment for bacteria, thanks to the BioExtract formula+ keeps for 12 months without cooling at temperatures between 2C and 30C+ for all freshwater aquariums+ Dosage: 5 ml on 6 l of water