I've been going back and forth on what kind of canister filter to purchase. Keep in mind that I am on a very very tight budget and would like to spend minimal money but do not want to compromise the quality of what I wanna do with the tank. Also, I do have some 13mm lily pipes that I would love to use (which is why I am going canister). I've been looking at the Eheim Classic 2211 and found it for 59.99 on Big Al's. Would this be a good size canister filter for the mini-m (5.5 gallons)? Ive seen people using the Eheim Classic 2213 but I feel that that would be a little too big. I've also been looking at the Zoo Med 501 (because it is cheap and affordable) but do not know anything about them. Does anyone know if I would be able to use the lily pipes with the Zoo Med? Problems with the Zoo Med? I would appreciate any feedback, thanks everyone!