Seachem 439 Prime 4 liter/1 fl. galPrime is the complete and concentrated conditioner for both fresh and salt water. Prime removes chlorine, chloramine and ammonia. Prime converts ammonia into a safe, non toxic form that is readily removed by the tank's biofilter. Prime may be used during tank cycling to alleviate ammonia nitrite toxicity. Prime detoxifies nitrite and nitrate, allowing the biofilter to more efficiently remove them. Prime also promotes the production and regeneration of