Originally Posted by DirtyTankMan
I have never done this but could you just remove the outtake (on a canister filter) and drain the water into a bucket instead of slowly siphoning out the water? Does anyone do this? Are there any obvious problems with this idea?
There is no reason why you couldn't. The only thing that I can think of is you won't be able to gravel vac and you will only he able to take the water level down so far.
I know that the Fluval Fx5 has a special valve for doing exactly that.