depending on your own schedule, feed the bichir approx 2 hours after you turn off your tank light, and any other light next to it. By this time most types of fish will be in their "sleep" mode (except of course other nocturnals). Drop the food at the same spot, or let it float, hugging a certain corner of the tank, it will learn where to come looking. Bichir may not see well but it will quickly smell its food in the water. mine goes nuts sniffing the substrate as soon as I drop in his food.
btw how big is your bichir?
btw how big is your bichir?