Don't forget the vitamins, alancolinet.
I'd remove 'the brown' once. After you remove it, import a few snails that will eat it. Might as well 'recycle' the little #$%@&. A few hungry Trochus, Strombus, and Cerith snails will keep the diatoms and slime algaes under control.
Unfortunately, "scooter blenny" is a name given to many different fishes. 'When in doubt, call it a sccoter' seems to be the way. However, if it is a
Synchiropus ocellatus it is a carnivore, preferring microfauna. You can probably get it trained to eat mysis (I would avoid brine shrimp) and the foods generally offered Mandarins. Pods are its first choice in foods. In an established aquarium with 80+ pounds of LR, it should do well.
Some people have had good luck with them, others can't get them to eat anything but pods, right up until the time they die in the tank. Although attractive, like the Mandarins, it's one of the fishes I'd prefer only dedicated aquarists attempt to keep.
