I'm in the works of setting up a 60 gallon "rimless" tank with front and back euro bracing. Its a custom built tank I recently bought, however after seeing the mitered trim, I derimmed and will be adding 2" eurobracing on front and back. Left trim on the bottom.
Tank dimensions are (36" L X 19" W X 20" H) I know they are oddball dimensions, but they are the correct ones, I've measured.
So this will be an internal external overflow setup similar to crazy mittens system.
125/50 - update Jan 2015 (pics & video)
Normally on a drilled tank, most reefers keep their water level about 1-2" inches below the top of the tank glass. Meaning they position their overflow that far down which keeps the water level at that point constantly. (evaporation happens in the sump, so you never see it.) Usually this is done with tanks that have trim on them, so you never actually see the water line, but also done on rimless too.
My concern is that, if I'm going to all this trouble on the tank, I want it to look its best and don't want a 2" gap between the top of the water and lip of the glass, its just not appealing to me.
So how far up can I safely have the water level? And what are the pros/cons of having the water too high/ or too low?
This will be a bean animal overflow setup, so risks of flooding tankside are mitigated. More concerned with overall aesthetics and trimming maintenance.
Right now I'm considering putting the internal box .5" -.75" below the tank lip. What do you think?