Overflow with canister filter

[wackyzman]

OK, I just found a great deal on a 90G tank. It has a built in overflow along the back of the tank. Could I run a dual canister setup on this tank? The overflow only has one drain and one return.

 

[Terrance]

Yes you can do this, but you cannot hook the overflow directly to the canister.

You can let the water drain through the overflow and into the sump, then have the intake of the canister suck the water from sump to the tank. Seems wasteful. Easier if you just buy a pump. I like the Waveline and Diablo DC pumps. They are energy efficient and quiet compared to pumps like Mag.