I just got a melanuras wrasse 3 days ago and he has been swimming back and forth on the bottom of the glass of my quarantine tank. It looks like he is looking for sand, but during the night, he sleeps in my container with sand. I dropped some pellet food but did not bother to eat them. I dropped some the day before and they were gone today, so I figured that he ate them. I am not currently dosing anything and is in a 20 gal tank by itself.