I don't! I would like to have one but I really don't think I can manage to take care any fish right now. Someday when I'm not this busy but for those who already has an aquarium or fish tank, if you are looking for a certain filter, you might want to drop by at  http://www.aquariumguys.com/aquarium-filters.html who sells about 150 different aquarium filters! It's all top selling brands and you can even read an article about filtering from that website too! They sell other than filters in their website so, visit now and take a look! Certainly you'll find something that will fit your tank. I know you gotta get a certain filter and it's not easy to shop for that, now they make it simple for you. You don't have to find it from store to store, just start browsing at the convenience of your home or anywhere in your pc or laptop! Isn't that neat? I think so!