i personally would return the scooter blenny, they aren't a true blenny they are dragonets like mandarins, they are extremely difficult to feed being that they only eat copepods, i had trouble keeping them in my 56 and haven't tried one since i upgraded to the 210 a few month back because i want the pods to grow out of control before i get one. they will pick at your rocks and look like they're eating but they just don't get enough. they will slowly wither away and die. you could buy copepods or live brine and see if they will eat that but your looking at high dollar food bills. i know it sucks but most awesome fish are awesomely difficult and picky.
personally i would get a bi color blenny and get some kick ass inverts like pom pom crabs, or a pair of harlequin shrimp.