The Ammonia Removal Filter Pad is a popular choice for multipurpose applications. It is designed to remove and control ammonia in ponds and freshwater aquariums. Simply place the filter pad in the path of flowing water to trap unwanted debris and particulates, resulting in crystal clear water. This 10in x 18in pad can also be combined with other filter pads, such as nitrate reducer pads and carbon pads. Regularly changing the Ammonia Removal Filter Pad will improve water quality and enhance the well-being of aquatic pets by removing solid organic compounds and reducing ammonia spikes and toxic buildup. It is suitable for use in both freshwater aquariums and ponds, and has the added benefits of polishing water for improved clarity.