at what point will the tiger barbs stop schooling together? i keep building up their school because they get picked off so id like as big of a school as possible but i dont want them to spread out and stop tightly schooling. i have juvenile cichlids with them so will that keep them tightly packed together no matter how many i add since they wont become too comfortable? i have 13 and i think 15-25 would look great in a 50 . whats the recommended max amount for a 50 gallon 50?