- Welcome to Reef Sanctuary and the RSM forums! I wasn't sure if you were an RSM owner (or future owner) from your post on the popeye issue. I hate to admit that I'm overstocked, but here's what I have in my tank (all except the Foxface have been in the tank a year or more).
Pair of Ocellaris clowns
Blackfinned shrimp goby
The Foxface will need to be given away when it gets too big. I got it as a last resort in getting rid of a Bryopsis algae problem - nothing else I tried would eat it or get rid of it.
I originally had 2 pajama cardinals, but they constantly fought with each other (probably both males), and after over a year of being battered and torn the submissive one finally died.
I also had an algae blenny that passed away after over a year. I think with no algae to eat it didn't get the nourishment it needed from the other fish foods it would eat. Mine would never take dried algae or other algae based foods. It got thinner & thinner till it must have died behind my rockwork.
The only aggression I've had with this assortment of fish, other than the 2 pajama cardinals, is that my dottyback and damsel will at times chase each other, with the dottyback being the aggressive one. And the big shrimp goby is pretty territorial about his cavern and will come out and "bluff" the other fish if they get near his home. But, other than the situation with the 2 pajamas, there is very little aggression going on, and an occasional "skirmish" between the dottyback and damsel has never resulted in any physical damage to either.
But, all fish, even of the same species, don't always behave the same, and the order that you add them can also affect behavior. They always recommend adding the most potentially aggressive fish last.
I've not seen any of my fish pick at any of my corals, although I'm pretty sure that some of the small peppermint shrimp that I've added have been turned into dinner by my shrimp goby - about 4" long now, and a big mouth!
Here's a compatibility chart that I used to refer to:
Good luck with your tank, and be sure to keep in touch with us!