No! Have expectations about fish and corals. 2 clowns is good and reasonable for a 20 gallon, maybe add a Blenny for algae control is even better. Think in terms of everything added to the aquarium provides a service. CUC, Blenny to help manage algae, proper and diligent maintenance by you to keep nutrients low, clowns to provide nh4 to the corals, and your filters to remove excess in between WC. You were on your way and made some good decisions and progress. Do some more research about the basics. There are some very good books so you can get a foundation and avoid all the noise here. Here is a great book to start with….