Hi
I run a beananimal overflow - Dead silent. Completely stable. Totally reliable. - I would never use any other style overflow.
I used to run two closed loops on my tank. I've taken them both out in favor of Tunze powerheads. I agree with you on the engery considerations, but I also feel that closed loops have many other drawbacks. Obviously, they are much easier to hide when compared to powerheads, but that seems to be the only advantage. I will never run another closed loop.
I am also building a 300G tank (72" x 36" x 27"). Basically the same with a couple of extra inches for hieght.
Hope we can share some ideas.
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