75g overflow options

I'm looking at options on drilling my new 75g I will be drilling the back wall instead of the bottom simply because of the stand. So im looking at either 2 holes 1 for a main drain and 1 for an emergency drain, or doing a bean animal with 3 hole. Which is better? I want it to run silent

Also what size holes should I drill?
 
I run bean animal and never been happier. Wife even approves of how quite it runs. My fridge (which is brand new and very quiet) when making ice is louder then the tank now. My slimmer is the only noise I hear. It makes a slight bubble noise but you have to listen for it.


Sent from pay phone in the airport.
 
Here is a pic of my setup on my tank. [attachment=0]ImageUploadedByTapatalk1412554316.774125.jpg[/attachment]


Sent from pay phone in the airport.
 
@Eckolancer wrote:
I run bean animal and never been happier. Wife even approves of how quite it runs. My fridge (which is brand new and very quiet) when making ice is louder then the tank now. My slimmer is the only noise I hear. It makes a slight bubble noise but you have to listen for it. Sent from pay phone in the airport. said:
What size holes did u drill?



I have one suggestion of a coast to coast overflow with a bean animal set up. But not sure how much the overflow box will run me from marc

Also can you get a top down pic of the overflow area so I know how to set that up, im leaning towards bean animal cuz of the silent reviews
 
I have 1-1/2" pvc for down and 3/4" for returns. It's worth the investment. Will need a little tweaking at first with the pipe length into the sump and water line. After that you never have to touch it again.


Sent from pay phone in the airport.
 
@Eckolancer wrote:
I have 1-1/2" pvc for down and 3/4" for returns. It's worth the investment. Will need a little tweaking at first with the pipe length into the sump and water line. After that you never have to touch it again. Sent from pay phone in the airport. said:
 
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