Provide excellent and reliable water filtration with API Rena Super MicroFiltration Filstar. Filtration systems are an awesome way to ensure your tank is in tip-top shape. However, microfiltration pads take it to the next level—they help to improve your filter's ability to remove small particles before the water circulates back into the aquarium and affects your water quality. This super system helps to keep your water cleaner and clearer while working to remove harmful ammonia, debris, chemicals, dissolved proteins, medications and dyes. Overall, this can help to reduce the amount of maintenance your aquarium needs. Plus, it's easy to install. Simply place the cotton pad into the top filtration compartment of your API Filstar xP Canister filter and replace each month for optimal results. It's that simple!