10 fish in 30 gallons

One of my buddies is moving away and sold me his 30 gallon tank along with the 10 fish he had stocked in it. I have some experience with saltwater but I’ve never kept this many fish before and I believe it may be overstocked? Right now, everyone in the tank is behaving peacefully and I am having no trouble keeping nutrients low due to the chaeto refugium the tank came with. Would I have to rehome some of the fish or can I continue to keep this stocking assuming aggression remains non-existent and nutrients remain under control? For context, there is one ocellaris clown, a red firefish, tailspot blenny, Toby puffer, chromis, royal gramma, and four small gobies