Shocked you fit a cleaner shrimp in there... I assumed a Sexy Shrimp would be about as large as you could go... have you modified your Cunzo at all? I have one I just set up with a barnacle blennie and a sexy shrimp. I also setup a Neptune DoS for AWC as I wasn't sure if the sump would be adequate. I'd say yes this is for an advanced hobbyist if you plan on going the reef tank route but when I say advanced, I mean, somebody who's aware of the fact that this wayyy to small for a clown or 5 yellow tangs... lolololol the barnacle blennie alone is a bit of a risk but they don't tend to require much regardless