Sorry but unless you got a male and female pair all but one will die right now they are not fighting because i bet they are jueveniles. When they get to adults they will fight to death untill a pair forms or only 1 left. I've tried many times to pair them some from petco some from other places locally same result everytime they ok 1-3 months then all hell breaks loose till one left. best way to have 2 in tank is buy adults that are a mated pair from a place that is honest and you trust not to lie ad sell them before they were actually sure they are a mated pair. you might get lucky and find a female and pair it up either way any others will get killed. i learned that the hard way.