Hey guys. Help me decide on what action should I take. I have an Irridescent shark on my 29 Gallon tank with 3 clown loaches, 4 corys, 2 pleco, 3 tiger barbs, 2 golden ram, 2 gourami, 1 glow tetra and 6 zebra danios. Should I return him or keep him? He/she is about 3 inches long with the tail included. He/she never bother any other fish and keeps to itself. Is not erratic or threatening other the other fish. I was told that he/she will get bigger and eat/attack the other fish. What should I do??? Thank you!