hi guys i have 2 indo datnoids in a tank with a perruno catfish and a leporinus. when i bought the first one, a reddish colored specimen it was peaceful and behaved normally. when i bought a second one, a more yellowish specimen everything changed. they were same size but then the second one started eating much more and then it got a bit bigger and more aggressive than the first one and the first one was bullied. it now mostly stays on one spot slanting on the wall. the second one also bullies the perruno catfish whenever the catfish wants to look for food and now the catfish mainly stays on one spot most of the time. what should i do? should i get another datnoid to disperse the aggression? i cannot move the first datnoid because no tanks would be compatible for it. one tank is for smaller predators that it will eat easily and the other is a tank for bigger predators that will eat it easily. what shud i do