API Filstar XP Filtration 20 ppi Aquarium Filtration Pads

Brand new API Filstar XP Filtration 20 ppi Aquarium Filtration Pads -Mechanical filtration -2 pieces inside -Maintenance: Every month wash the foam pad thoroughly in a basin of water taken from the aquarium. Replace the foam pad every 3 months. Never replace all filtration foam pads simultaneously so as to ensure optimum biological equilibrium. -Instructions: Put a foam pad into the bottom filtration compartment. -Works great for freshwater & saltwater aquariums