Filter-Max III Prefilter - for Aquariums over 40 Gallons PROLONG FILTER LIFE - Pre-Filters keep large particles, waste, fish, and other fist tank items from getting inside your filtration system. HIGH-GRADE SPONGE - Filter-Max uses high quality sponge material with solid construction that fits securely into the intake tube. EASY TO CLEAN - With the easy installation process, this also makes the product easy to clean for recommended maintenance VERSATILE POSITIONS - This pre-filter is functional in either a vertical or horizontal state, whatever your aquarium needs DESIGNED FOR MODERN AQUARIUM - The regulated foam is great for high flow rates, and is built for tanks over 40 gallons