I have a starry blenny that has been in QT for 6 weeks, but I never see him eat. He ate a few mysis at the store. The blennie never showed ant s/s if illness. But how do you see spots on a spotted fish:) ? His fins were clear however. I placed him in a QT with SG of 1.010 to match the lfs water with an established healthy yellow tail damsel. One week into QT the damsel was hiding and breathing fast. I assume the blenny brought something with him. I added Seachem Copper treatment. I raised the level over several days. One day after redosing after a water change I found the blenny pale, panting hard, and twitching on his side. I did a 50% water change and immediately he improved. That was several weeks ago. I have not added any medications to the tank since. Because the dang blenny is not eating. Both fish look good. the YTD eats well and even recovered from an injury from the blenny. I am considering placing the fish in the 40B because it has some mature rock and algae the blenny might eat. What do you think? The blenny does not seemed to have lose much weight so maybe eats when I am not there. I do have an automatic feeder to help feed.