Down to 5. My QT has officially turned into a Neon only DT, lol. I even added a few decorations

. The wife is not happy because it means no new blue Glofish until the Neons get out of the quarantine tank.
I'm as clueless as I was from the start. I had almost decided to risk putting them back in the DT...but the day after I said it I woke up and another one was dead.
I have no idea, I have to think it's just poor breeding at this point since there are no signs of illness or disease. My real worry is that if they continue dying off...what I'm going to do when there is only 1 or 2 of them? Should I consider euthanizing the remaining ones since there's no way I'm going to re-up their schooling numbers, and I know it'd be bad for them being solo or just a pair waiting to die. I'm really not sure.