Which is the best skimmer?

[Coderad]

I was planning on putting small pieces of live rock and some carbon in the sump for media. Is this good enough.?

As for the skimmer though where whould you put the return line, back to the sump or out to the tank?

Can I put the intake pump for the skimmer next to the intake pump for the sump or will that reduce flow back to the tank?