Overflow Sizing Help, Please

[mbutzer]

I am planning a tank that will require 2300 gph flow to the filter. I think I'll use two overflows. Can anyone tell me what diamter the bulkheads need to be for 2300 gph?

 

[Guinness]

Minimum of 2". I would probably go with 2 1/4 -2 1/2.

 

[eh1421]

try this overflow calculator
http://reefcentral.com/calc/drain.php

mike

 

[Bud8Fan]

Thanks eh !! I've been looking for one of those.

 

[mbutzer]

Cool! If I understand the overflow calculator, I'll go with 2 x 2" pipes, each with an 18" wide box. The calculator says one 2" pipe is fine, but using 2 will give me wiggle room if I ever want to increase the tank turns.

Thanks for the help!