In my sig you will see the fish I have in my 10g. Well ever since I got these x-ray tetras they have refused to eat while the red eyed tetras eat every time I put food on their. But these x-ray tetras do eat the corys food and leave little for them to eat even though I split the algae wafer in to three parts and spread it out through the tank. Why won't they come up and eat the flake food like the other fish?