I have blue-green reef Chromis as part of a small, peaceful community tank. A few days ago, one of them developed the habit of spending most of its time swimming vertical, pressed against a corner of the tank. I notice this happens then they just disappear I assume the clean up crew gets them, and this happens to them one at a time to there is no more!
any ideas all the othere fish are fine as well as the corals.
any ideas all the othere fish are fine as well as the corals.