I agree with mikeO, try different foods till you find one they like. But definitely feed a little bit of what everyone likes, for example, in the morning I feed my fish flakes and in the late afternoon I feed bloodworms, so there is a good veriety. I am also thinking of trying brine shrimp. Like your neons, my fish have foods they won't eat. They won't eat tubifex worms. I don't know why, but they just won't eat them.