25 Gallon SPS holding tank

[Marlin65]

It looks a bit strange because I originally had a bit of a different plan in mind but ended up running out of room so had to adapt a bit.

One of the stand pipe is on a gate vale and just feeds the fuge. That water runs over the black overflow into the next compartment along with the other stand pipe, and from there both go to the sump in the lower level.
Back to the tank on a Mag 9.5 through a SWCD
Originally I was going to run one standpipe to the Fuge and one to the sump but I had problems with getting the plumbing all in there.

Next job will be to finish the rest of my 60 gallon cube.
Wanted to set this up and get it ready so I have somewhere to QT my fish ect.
Anyone have any ideas for a not so noisy pump would like something about the size and output of my mag 9.5 as I am limited on space.
I will also have to find a smaller heater to fit in the sump, but with 250w on 25 gallon I probally will not need one.