IF-202 Internal Filter For aquariums up to 20 gallons, the IF-202 is a compact energy efficient aquarium filter that can be vertically or horizontally mounted with the included suction cups. The IF-202 comes equipped with an optional spray bar attachment for a wider range output. The IF-202 even includes an optional Venturi-Line for added oxygenation and a dense filter sponge for maximum filtration. Space Saving Design Energy Efficient Multiple Return Options Easy to Install and Maintain