Tetra 250ml Safestart - RC045Tetra SafeStart is used for the safe introduction of fish to new aquariums. Immediate activation of aquarium's biological activity. Reduces dangerous ammonia and nitrite levels thereby helping to keep fish healthy Also ideal for maintaining biological activity following water changes filter maintenance power cuts etc Can be used to resolve problems with high ammonia or nitrite in both new and established aquariums. When setting up a new aquarium: Set