Canister Filter Necessary?

[Digital Deviant]

You don't have to fill either the fluval or eheim with water before you put it under the tank. You can use gravity and water from the tank to fill the canisters prior to turning them on. All you do is empty the outlet hose in a bucket, then open the inlet hose, putting water into the bucket until you get a nice steady stream. Close the inlet hose, connect both the inlet and outlet hose to the canister. Open the inlet hose, and wait until you hear running water stop. Turn on canister.

My Eheim Pro 3 has one tap and a quick release it's so easy to do my maintenance, and a great way to siphon off some water. I just connect a dry filter back up, turn on the tap and it fills right back up!