In my tank i have 2 balas a pictus catfish and a rainbow shark. My rainbow shark is a bully and tries to attack the other fish. My pictus always hides in one spot now and he used to always be out swimming around and the rainbow shark kept chasing him and now he just hides all the time. He swims out every now and then to get food but he comes out and goes back in so fast. My balas get scared and swim away when he comes near them cuz he chases them. I was just wondering if there was anything to do or if it was just a bad idea to get him?