Victor & unblinded - thanks so much for your replies! Such helpful notes, and it never crossed my mind to think about whether there are any airborne contaminants making their way in. #-O I can't think of an immediate culprit in terms of cleaners or anything like that, but at least now I have som...

Hello there! I'm new to the forums, though not to fishkeeping. I had a bewildering experience recently with my Synodontis eupterus kiddos, though; I have two of these guys, each roughly 3.5" in length, acquired at the same time ~6 months ago. They both live in a 75gal community tank with some h...