Bought this fish 3 days ago and he won't eat frozen shrimp or formula one. He was eating hair algae but I cleaned the glass. He chews up the substrate but there is nothing there. Anybody out there with some experience? Tried putting baby bristle worms in front of him but he ignores them. He is supposely to be a predater of them. Mamma forget to teach him. Don't think he can go much longer without eating. HELP!