Tetra SafeStart contains beneficial microorganisms which rapidly establish a safe biological enviroment and thus enables the fast introduction of fish into a newly set up aquarium. For all freshwater aquariums. 250ml for 300 litres of aquarium water. Application: 1. Condition tap water with Tetra AquaSafe. 2. Shake well and add 5ml per 6 liters of aquarium water. (recommended minimum water temperature: 20C. 3. Introduce a moderate number of fish – consult your retailer for details). 4. Feed restricted amounts during the first two weeks. Store at room temperature.