Tang aggression to Lawnmower

[Wayne]

I just got a juv. tomini tang that has from day one picked on my lawnmower blenny. Just because they eat the same food source? The is certainly enough rocks, flake/pellet, seaweed clip to go around in my 90 gallon.

I am going to be rescaping the tank next weekend and I am hoping this will help, but what other options do I have aside from choosing between the two?