I have a 75 gallon reef tank currently housing 2 clownfish, 1 yellow eye kole tang, 1 foxface, 1 firefish, &a a coral banded shrimp. I also have a small cuc. I know the foxface will eventually outgrow the tank and plan on either upgrading my tank or getting rid of the fish when that time comes around. Is this tank already overstocked?
For the most part it doesn't seem like your tank is overstocked, I'd like to say there is still room for 3-5 fish depending on type , furthermore id be more concerned with chemistry excessive nitrates , since though it is a 75gal depending on how much LR you have it can displace a fair amount of water. Try testing your water and go from there.