New to saltwater: question on setup

[doraemon]

Hello everyone,
I am new to the saltwater game and i just setup my 90g FOWLR tank. but nothing is in it right now and probably will be like that for a few months. I will probably just buy rocks for the next few months. however i do have a few questions regarding my sump and i was hoping someone can help me out. I have a predrill tank and i am running a 700GPH sump pump. However the water movement is a bit louder then what i would like ( since it is in my bedroom ). Any idea on how to lower the sound? I was thinking maybe making the two predrill holes for the sump and just have the return pipe somewhere else. no sure if that would help.
I also have a 8w UV that i dont really how the best way to run it. So any suggestions for on that would be great too!
Thanks!!

 

[rot_stupid]

As far as noise, you don't mention if it's from the overflow or return pump. A strip of airline tubing stuck down the overflow and tucked away helps stop the gurgling noise.

 

[doraemon]

The noise is from the overflow to my sump. I think most of the sound is coming from the sump.