The Dymax Pro-Lite filter media is incredibly effective in removing harmful substances such as Ammonia, Nitrite, and Nitrate. Highly Effective Filter Media Dymax Pro-Lite Filter media is highly efficient in eliminating Ammonia, Nitrite, and Nitrate, while providing ample surface area for developing denitrifying bacteria colonies. It’s a great solution for maintaining the cleanliness and well-being of a freshwater or saltwater aquarium. Highlights: For freshwater and saltwater aquariums and pond use Helps remove ammonia, nitrite, and nitrate Suitable for trickle, canister, sump, and top filters Highly penetrative porous structure Provide a primitive living environment for microorganisms