I want to add something to this and I know it is a little off subject but with the new ORA Mandarins even they are eating frozen remember they are still slow eaters. Unless the new ORA Mandarins come up to the top to eat, the other fish are so much faster and the mandarins are at the bottom. Michael I have never been able to keep two mandarins in one tank. Maybe when they come up with ORA green ones I will try to keep two in my forty since they do not compete with jawfish for food.