Adding additional livestock doesn't affect diatoms, since it's not a typical nuisance algae... it feeds on excess silicates in new systems, and once the food supply is gone, the algae disappears. However, if you just added the above listed livestock 4 days ago, then let everyone settle in for a while. Remember the saltwater mantra - "Good things happen slow, bad things happen fast".
One question - what other fish do you plan on adding? You want to plan out your livestock list carefully, and typically it's recommended clowns go in last since they can be very territorial.
You didn't mention it, so..... When you bring in new fish, you really need to quarantine them.... in case you were unaware. This prevents unseen diseases from being brought into your main tank. When you bring in your next fish, QT it for a month, then put it in your tank... if the clowns give it trouble, pull the clowns and QT them for a week or so to allow the other fish to establish itself, then put the clowns back.... usually resolves any conflicts.
Wanna calculate the cost of that new reef tank?? Take your worst nightmare, double it, and you're halfway there.