Quote Originally Posted by Aloha Don
A venturi siphon in your FT will keep it at a constant level. It will not fluctuate and it will get the waste off the bottom as well.
But to do that would require you to drill a hole in the tank at the level you want the water to exit, correct? Or is there a way to do it without drilling holes (a la a PVC overflow which somehow pulls from the bottom of the tank instead of the top)?

Or perhaps not. I did find this picture online: