Designed for use with your API Filstar XP Filter, this three-pack of API Filstar XP Micro Filtration Pads leaves behind healthy, crystal-clear water. These filtration pads are designed with a unique three-layer microfiltration technology that thoroughly cleans and filters water using mechanical, chemical and biological levels. This fine-quality cotton filter pad removes even extremely fine waste, sediment and particles from your aquarium water to create a healthy environment for your fish and marine plants. Each one effectively polishes the water, helping to clear away cloudiness and get rid of small particles before the water is reintroduced into the aquarium. Simply replace the cotton pad every time the water is changed or once a month. Your order comes with three API Filstar XP Micro Filtration Pads.