hi,
i have recently got 2 iridescent sharks (catfish) thay are only about 2 inches long. one kinda swims around every once in a while, the other jus hides at the back of the tank, the only time i see both of them at the same time is when i put on the moonlights in my tank. i have noticed that one of them is a bit pale, it has went from a nice black colour to a grayish white. i have read that when you feed them that they come to the surface to feed, i use tropical flakes and also once or twice a week use frozen blood worms. they seem to stay at the bottom of the tank, so i have been using catfish pellets for them but never see them feed.

any ideas????

first off..... take them back thoes fish get areoud 18" long i believe......
and as far as the feeding you need to feed them sinking pellets and when the lights are out these are mostly noctornal fish.....