return pump

Hello, I have a question. My return pump flow is pointing towards the center of the tank. Should I move it upwards so the water on the surface moves more? or is it better on the middle? or it doesnt matter? Thanks in advanced.

Since I'm a little green to the hobby, I had my LFS set up my new Red Sea Max S-400 today. It's up and running and really seems awfully noisy, without the protein skimmer even on. Turning that on just makes the system even louder...so loud that I can't really have a phone conversation in the...