My first 180G Reef tank 5'x2'x2.5'

[gregzz4]

Depends on how anal you want to be
Your question covers a lot of topics ...
And I see you've bought a lot of stuff lately ... where did it all come from ?

If you want to ensure that absolutely nothing 'bad' gets into your new system, then the answer is NO
If you don't plan on adding any fish to your 180 for the next 10 or 15 weeks, then apply this to the corals ...
A pic I saw of your's shows a yellow tang with a nasty pink mark on its side so I'll assume your fish need some clean water
And this alone would stop me from adding anything to my tank

For corals;

If you want to take a chance, then you're perfectly fine rinsing your corals in a tub of tank water before you add them to your new 180

Using a dip and looking for 'stuff' that comes off is a good idea before adding to your new DT

For rock;
You'd have to wait a minimum of 72 days if you want to avoid Marine Ich. So, it depends on what you are trying to avoid ...

If I was you, I'd keep my stuff in QT for awhile longer ............