Seachem head start is a Aquarium conditioning pack for freshwater and marine aquariums. The pack contains: Seachem Prime 100ml This is the complete and concentrated conditioner for both fresh and salt water, it removes chlorine, chloramine and ammonia and generally makes the water safe. Seachem Stability 100ml This will rapidly and safely establish the aquarium bio-filter in freshwater and marine aquariums, this prevents the number 1 cause of fish death \"new tank syndrome\". It contains a blend of bacteria\'s which will break down the amount of ammonia, nitrate and nitrite. Seachem Clarity 100ml This is the ultimate clarifier for both freshwater and marine aquariums. It employs an advanced polymeric flocculating agent (clumping agent) that is both reef and plant safe. This product will clear all types of clouding. Save money by purchasing all 3 together!