Newbie advise needed... Diary of a new tank junkie

[pirate]

Depends on where your return is located. If they are both in the overflow box then make it a drain. Do a herbie, so quiet, My equipement makes most of my noise. In my tank I had a drain in a overflow and the return in the other corner, I herbied it. And have my return coming up over the back. I do see 1 (emergency drain line) but if it had been the return you'd still see it. I like the peice of mind of having a back up, incase something happens.