Features: 1¡¢Advanced ammonia-absorbing zeolite, containing a variety of minerals and trace elements, can quickly adsorb ammonia ions and nitrous acid in water to remove toxic substances. 2¡¢It can stabilize the PH value of water, balancing feeding water, and provide minerals and trace elements needed for fish growth. 3¡¢Natural material, with the function of powerfully purifying water quality. 4¡¢Aquarium filters, adsorbs harmful substances of water quality. Both seawater and freshwater are available. 5¡¢Wonderful accessory for fish tank, aquarium. Condition: 100% Brand New Item Type: Absorb Ammonia Zeolite Filter Material: Absorb Ammonia Zeolite Color: As picture shown Weight: Approx. 527g Commodity use: Aquarium filtration, adsorption of harmful water quality substances seawater and freshwater are available. Instructions for use: 1. Before use, rinse with tap water before putting it into the filter, or put it directly on the bottom of the tank. 2. It is recommended to use 1 pack per 200 L of water. 3. After using for about 2 months, it can be reused after soaking in salt water overnight. Package Included: 1 x Absorb Ammonia Zeolite Filter&nbsp