Thank you for your help. He’s not swimming much with the group, and looks like he’s not going to make it. Is this something that could affect all of the fish? Sorry for asking questions you may not know, just worried about the whole batch being infected and putting them in the main tank in 2-3 weeksI don't know really. I'm bad at fish disease. I just knew it wasn't right. Maybe A201 has a suggestion?
Oh man, that is a shame. They have quickly become my favorite tetra/schooling fish. I just put six from QT into my 55 gallon planted, and man, do they look awesome!!Various troubles with newly purchased Rummynose are becoming common topics on the fourm.
It seems the general consensus has been genetic weaknesses due to poor breeding practices by the suppliers.