Questions - Need some input

So I have not updated for quite awhile, so I wanted to give a few picts, and description.

Building a 120gal Mixed Reef...And now we have water, and rock. Still need to finish the return pump plumbing, but getting there. We were hoping to have it done this weekend, but we are waiting for 1 piece of plumbing to get here, probably Tues or Wed. Had to order a pvc union, in order to connect the pump.
I realize that there are lots of things in these pics, like the heaters, and probes ...