Unfortunately the pajama cardinal didn't make it
I know they can be tricky . He was fine Saturday, seemed a little "off" on Sunday, and by Monday night had no choice but to remove him and "do the right thing". Not sure whether it was just bad stock or not, all parameters are spot on and the others are doing fine. They way he was attempting to swim looked like some sort of swim bladder issue.
Going to monitor everything closely for another week or so before I decide what to add next.