My tiger barbs stay to themselves. They school with the serpaes now and again. As I added them,, I added them in 3s and 4s, some of the old"kings" got dethroned, but only one of these died/ I have Normal, Green, and Green Platinum tigers. My only complaint is that they are pigs. They nibble my umbrella plant, eat the flakes, and freeze dried shrimp, AND they eat my plecos/catfishs algae wafers.