Going with no overflow box question?

[coryaquarium101]

I currently have a 90 gallon tank and it has the built in mega overflow box. I am thinking about getting a new tank and selling mine because I have to take out a plenum and the tank has some scratches and I just want to start over. A Fish store here is telling me the way to go is with no overflow and just drill 2 holes in the back of the aquarium. Looks like a slick way to go because there won't be that ugly big overflow box taking up space. What are the pros and cons of doing it this way?

 

[Coasterfrk]

Well if the holes are mounted high then they are essentially overflows. If mounted lower then they will back siphon the water in a power outage.

 

[coryaquarium101]

Yes they would be high up. why aren't all tanks made this way? the internal overflow box is huge.

 

[nemosworld]

you could buy or or have a small overflow box built, like mine.

I have a street elbow inside the overflow. and i'm using the durso setup externally, with slow flow.

 

[coryaquarium101]

why do u still need the durso setup externally?