Ok, this is my first time writing one of these. I have a 5 gallon tank with a male gourami and a black phantom tetra. The gourami seems to be picking on the tetra. He chases him away and he won't eat. We went to a pet store and they said that the gourami would be okay with the tetra. Is there any hope for the tetra. If not, what other fish can be put in the tank with the gourami? The tetra also twitches all the time. Is that normal? Please respond quickly. Thank you