HeadStart conditioners pack combines Prime, Stability, and Clarity into one convenient pack. It's great for any aquarist but is ideal for the beginner. Prime is the complete and concentrated conditioner for both fresh and salt water. It should be the first choice conditioner when setting up a new tank, adding, or changing water. Prime removes chlorine, chloramine and ammonia. Stability will rapidly and safely establish the aquarium biofilter in freshwater and marine systems, thereby preventing the #1 cause of fish death: "new tank syndrome". Clarity is the ultimate clarifier for both fresh and saltwater. It employs an advanced polymeric flocculating agent that is both reef and plant safe. Clarity is the only clarifier on the market that does it all! Clarity will clear all types of clouding.