Very few people, novices as well as experienced hobbyists, have been able to keep a school of them for sufficient length of time. Most people find that they start to kill each other off until you are left with one or two.
too true, in smaller aquaria. I have witness successful schools in EX-large tanks (700-1400g) but usually the numbers dwindle in smaller tanks like my 65g started with 5 after 4-5 months I am down to 4. hopefully they stay at 4 but they are really aggressive towards eachother and I think tank limitations may play a signifigant role in that.