Seachem head start is a aquarium conditioning pack for freshwater and marine aquariumsr the pack containsr seachem prime 100mlr this is the complete and concentrated conditioner for both fresh and salt water it removes chlorine chloramine and ammonia and generally makes the water safer seachem stability 100mlr 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 bl