It's been a bad week to be a fish in my tank. So far I've lost a kole tang (two actually), a flame hawk, and today my beloved yellow blenny. All showed the same symptoms; labored breathing, loss of color, slime coat coming off their bodies, not eating, and very lethargic.

All except for the blenny went down within 1-2 days of showing the above symptoms. So far, the solar fairy, watchman goby, and fiji damsel show none of the above signs and are eating heartily. Of course I won't be adding any new fish for at least a couple of months.

From what I've been reading this week, it seems like there is some kind of bacterial infection that's causing this. The last fish I introduced was the fiji damsel and that was two weeks ago.

Does anyone have any similar experience or insight into something like this? Of course, I should be using a qt tank, but I didn't. Would a UV sterlizer be something beneficial that I should add to the filtration system. Thanks for any idea and info!