Tetra SafeStart makes it safe to introduce fish immediately after setting up your new freshwater aquarium by creating a biologically active habitat. Introducing fish to a new aquarium, without an extended period of 'cycling' the tank, can cause toxic peaks in nitrite which is dangerous to the health of your fish. Tetra SafeStart acts as an effective, fast aquarium starter by introducing live bacteria into your new aquarium, which can work to quickly break down toxic nitrite and reduce harmful ammonia levels. Tetra SafeStart can also be used at any time where the balance of your aquarium environment is interrupted, such as new fish stocking, after medications, water changes and all bacteria losses. There are lots of things to consider when starting a new fish tank, such as ensuring the water is suitable for fish to live in. The Tetra Safestart is designed to help your aquarium filter 'mature'. A 'mature' filter deals with harmful chemicals in water such as nitrite and ammonia, creating a happy home for your little fish. Tetra SafeStart is a unique formulation that contains active bacterial ingredients to eliminate the potential for new tank syndrome. The solution can be applied directly to standard tap water, working to neutralise harmful chemicals such as ammonia and nitrite and balancing water pH levels. Ideal for use when setting up a new aquarium, allowing you to introduce fish immediately. Suitable for use in all cold water and tropical systems.