I have 3 rt I got from petsmart and 1kkp and 1 blood parrot in the same tank, they get along great for now. I have 2 rt I got from bluegrass aquatics, I tried putting the two from blue grass in the tank with the others and one of them instantly started locking up with every fish in the tank. If I leave him in there will he eventually stop or will he kill them all. I have them in a 55 gal and they are all about the same size except for the kkp and blood parrot they are bigger.