So I have a diamond goby that has probably reached 5". My friend just ordered one that is supposed to be between 2-3" and who has a large tank. Should I try to catch mine and trade since I have a nano? I'm pretty stocked w a clown, the goby, an algae blenny, a small six line (ordered) and 4shrimp. All I got to serve a purpose aside from the clown. Would I be causing more damage to switch? Should I leave well enough alone?