Well, My filter broke the other day!!!! I'm so mad!! Anyway, I went out and got a Cascade 1000 canister filter. It says up to 100Gal tanks, so I figured it's more that enough. Now my question is, If I were to put the Co2 tubing from the 2liter bottle into the intake of the filter would that be better for diffusing it? I figured it would be okay, because it is a closed system, but I wanted to make sure. What does everyone think??