Key Features Zeolite filter media 10L Bag Reduces ammonia levels Surface area helps create environment for beneficial nitrifying bactiera to grow Can be used loose or within a filter media bag Perfect for use within a filter or directly within a pond / tank Superfish Zeolite filter media excels at absorbing harmful ammonia from the water to prevent algae growth and poisoning. Zeolite is much more effective at removing ammonia than nitrifying bacteria and will keep ammonia levels in check while the biological filter is being established. Superfish Zeolite also provides excellent surface area for nitrifying bacteria to establish themselves. Zeolite is a popular addition to classic filter medias. It works great in ponds and aquariums. This can be used within the filter or directly in the tank or pond. Superfish Zeolite can be used loose or contained within a filter bag. Ensure you check the appliance you’re using the media with for specific information on how to use the zeolite within