So the Bangaiis will school when young, then as they mature the problem starts. Learned that the hard way. Have a 500 gallon, thought a school would be awesome, got 8 for quarantine, got down to 1 in a hurry. Wan't sure if it were the fact they were from petco or bullying, but noticed the biggest one survived, the others (always the smallest of the group) died off one by one. This was over a period of 2 to 3 weeks, so I know it wasn't velvet or ich, and I dewormed the group with praziquantel. Then I also did more research and figured out the above, that the Pajamas and Flames will school, the Kaudern's (Bangaii) won't. So, I guess I have 1 Bangaii in a 525 gallon tank.