Be careful running carbon on a freshly cycled tank that has no / minimal nutrient sources. You're liable to exacerbate cyano uglies because of stripping all the nutrients out. At this stage you want a bit of algae and such to get hold, so there's some more nutrient cycle available. That then gives you food that you can start adding your clean up crew to eat, and gives pods something that they can consume, once you get your first influx of them in.
Also if you do have a watchman goby and bicolor blenny on order, you also want some algae growing. The blenny is an algae eater, and the Goby ideally has pods and some sand algae to eat while sifting.
If you want to keep doing stuff to the tank versus letting it chill, now is a good time to get a bottle or two of various pods and maybe a bit of phyto to add in. The pods act as a bit of a clean up crew as well, but just as importantly a fish and coral snack. Live phyto also will pull nutrients out, and all phyto will give the pods (and coral) something to eat.
If you dose both before fish, you can have a metric butt ton of pods get established due to no predation.