Well I just tried using one that my roomate had gotten with a tank he bought. First it leaked everywhere, then did not move as much water as I had hoped. I then went out and bought the micron filter and blue sleeve, and the micron filter does not fit in the canister. I said screw the micron and was just going to use carbon and the sleeve(which did not fit perfectly either,) and the thing would not pump water. It was running, but the impellor would not line up right or something. Im done with it for now.