plumbing question

[jminick2]

hello I've been looking at 300g on CL for a couple days. it has 5 holes drilled in the back what kind of system would that have been set up for? I have only ever ran durso so I was just curious. thanks

 

[bhbell]

A lot of different configurations possible based on where they're at.

 

[pmrossetti]

Bean Animal with 2 returns?

 

[thegrun]

Sounds like a closed loop system, but we could give you much better advice with either a picture or a dimensioned diagram.