This is the filter that I have currently. It came with the tank, I may get a new one in the future but I'm just using this one for now. I bought a 6 pack of the replacement filters that fit it at walmart but I'm wondering if there is something better I can do.
Marineland Penguin Power Filter, 50 to 70-Gallon, 350 GPH: Amazon.com: Pet Supplies
Marineland Penguin Power Filter, 50 to 70-Gallon, 350 GPH: Amazon.com: Pet Supplies