Reap the full benefits of Seachem Safe™ - a fast, efficient conditioner for both fresh and saltwater! Quickly and safely neutralize chlorine, chloramine, and ammonia so your biofilter can do the job of removing them. Additionally, Safe detoxifies nitrites and nitrates to help your filter run more productively! Non-acidic & pH neutral, it won't affect your skimmers either. Use for setup & when topping off or replacing tank water. Directions: 100 mg/Safe per 100L for 1 ppm chlorine/chloramine or 300L for ammonia. For exact measurements, use Seachem's Digital Spoon Scale. To treat a 300 US gallon tank, add 1.25g (1/4 tsp) as required for chlorine/chloramine or 300L (75 US gallons) for ammonia. Can be added directly to tank; if so, use base dose.