Here is a post from someone on the newgroups about food:
since i have successfully kept butterfly's for quite a while, i figured i'd toss in my ibservations (which to date haven't been flamed! thank GOD!) butterfly's can and will OCCASIONALLY travel to lower levels of the tank,
usually after lights out {black lights are cool} in search of food... as for what they'll eat; just about given anything if given the time to discover it. try frozen blood worms, dangling them just in the water. usually thet;ll come over and nibble the voraciously. if you are feeding flakes, sprinkle them in the current from your up lift tubes or your power filter or whatever manner of water is turbance that you have. my butterfly's all "hit and run" when it comes to eating; they glide over, get by the food, dash to it, bite, and run.if you can, give them an occasional cricket, the motion of the cricket trying to swim away attracts the butterfly's and when they attack, you will see exactly how BIG these buggers mouths are. oh, and their quick. how quick? well, my danios, which escaped ghost andclown knifes quite well, are no longer, er, "viable".
Matt: you HAD 4? they are suppose to Live a long life..what happened?
PS.. else where in the thread the person bought the Butterfly from walmart.... How did walmart get such a fish?