Ive had a red tail shark for a week now and im having to force flake food to the bottom and watch closely to make sure he gets some because he will not come up to eat before the other fish have ate all the food. He has a healthy appetite, never stops looking for food, and seems to be adjusting to the new tank very well. Wondering if i should buy some food specially for him and if so what are some good brands and are there any foods to bring out his colors. Any advice would be appreciated.