i have a pair of festae by themselves in a 75 gallon tank. when they were younger (about 1 in.) they would eat bloodworms and pellets. now they are about 6 and 4.5 inches. i noticed a couple months ago they have been eating less but at least still eating. the last week or so i noticed that they really haven't eaten anything. i have been feeding them the same food. i can see all the food that i give them floating around. they are both active and healthy as far as i can tell. any thoughts or suggestions on what i can do to get them to eat more?