Seachem Safe, 250 gm, is the complete and concentrated dry conditioner for both fresh and salt water. Safe removes chlorine, chloramine and ammonia. Safe converts ammonia into a safe, non-toxic form that is readily removed by the tank’s biofilter. Safe may be used during tank cycling to alleviate ammonia/nitrite toxicity. Safe detoxifies nitrite and nitrate, allowing the biofilter to more efficiently remove them. Safe is non-acidic and will not impact pH. Safe will not overactivate skimmers. Use at start-up and whenever adding or replacing water. Removes chlorine, chloramine and ammonia For freshwater & saltwater aquariums Use 100 mg Safe (scoop) per each 100 L (25 gallons) as needed to reduce chlorine and chloramine or per 25 L (6 gallons) for ammonia. Safe is the dry version of Seachem Prime and shares all of it’s advantages; however, Safe is even more concentrated than Prime.