I would like to get some advice from you. I’ve just bought beef heart to feed my discus yesterday, but look like they don’t have interest to touch the new food at all (never eat at all). Normally I feed them blood worms and fish flake. Do you have any best known methods to make them have interest or slowly accept the new food (I know discus not able to accept new food immediately, but really don’t know how to improve that)? Probably you have been facing the same experience before? Please advice! *SICK*