If you can I'd turn the powerhead off, is the wrasse fairly new to the tank? I had a neon goby that took shelter in my skimmer for a few days when i first put him in the tank, after he became use to the tank he left the skimmer for good
The 6-line can be very aggressive towards other wrasses. In my experience mine has been a model citizen to all other tank mates, new and old over the past 3 years in my 100 gallon. Mine once took a nice spin from an MP-40 vortech while poking around for copepods. He was just fine after a few days and has stayed away since.