Drill 2 holes for return or just one?

[cr2jones]

I have a 120 Aqueon (I think) reef ready that I am using for a build that has been 2 years in the making. Rock is curing. My Question is should I drill for two return lines or just one? I am using both holes in the reef ready overflow for a Herbie drain. I am going to use the Triton method so flow will be 1200 gph. thoughts?

 

[hijinks7]

I have a 120 and I drilled 2 holes for the return since I want the same look on both sides. Its just 3/4 inch bulk heads. its 1.25in from the pump to a T reduced down to 3/4 to the bulkheads.

 

[mfinn]

I only have a single return on my 240.