Fluval Ammonia Remover removes ammonia before it can harm fish. An effective addition to normal filter media, it reduces unacceptable levels of ammonia. Fluval Ammonia Remover is a natural ion-exchange filter media designed to remove toxic ammonia from freshwater aquariums as water passes over it. Use this product to provide a healthy environment when setting up a new aquarium or maintaining one that contains a higher than average fish stock. In chloramine treated water, it helps remove excess ammonia created when the chloramine bond is broken to release free ammonia. Ammonia Remover should be used exclusively in freshwater aquariums as its ionic functions release captured ammonia in brackish and saltwater. Ammonia Remover does not show any physical change as it loses its activity, which is determined by the amount of ammonia it contacts. Ammonia Remover should not be left in the filter longer than a month. Fluval first broke onto the aquatic scene in 1975 by introducing the worlds first 3-stage filter with synchronous motor technology a landmark breakthrough that is still applied in the industry today. Since then, Fluval has built a legacy around this pioneering spirit, relentlessly adapting in a changing world to launch innovative aquarium products that remain at the forefront of technology, and which set the bar in quality, style and functionality. Above and beyond its manufacturing role, Fluval prides itself on its charitable and educational efforts that give back to the fishkeeping community, whether it means helping to fund the protection of wild coral reefs or jumping on a plane to document endangered fish species halfway around the world. Fluvals mission is not just about building products that mimic the natural world, but inspiring aquarists of all skill levels to enjoy and respect the hobby for generations to come.