Questions about building overflows and drilling a tank?

[SeaHorse_Fanatic]

On my 65g, I built a 8" tall by 6" wide by 4" deep. I have it drilled for a 1.5" outflow & I have my 3/4" return comes back the other side.

If I was to do it for a 6' tank, I would probably do the same for each corner, but I would have the overflow set maybe 6" from the side, so you don't see the "ugly" inside of the overflow & would have water entering from 3 sides of each overflow.

Just my experience & thoughts. There are other reefers with much more experience with overflows, so hopefully they'll chime in with their ideas too.

Have fun.

Anthony