Tetra Whisper 2-10i Power Aquarium Filter (2-10gallon)
~Unusually quiet, since the motor is under the water
~Mounts on the inside of the aquarium
~Function in as little as two inches of water
~Can be used for turtle tanks or for creating a waterfall inside the tank
~Designed for aquariums up to 10-gallons
~Features adjust easily to high or low water levels with mounting suction cups and/or bracket
I used pillow stuffing instead of buying filters cartridges and it worked well.