I have a black ghost knifefish and he lives in a 29 gallon tank with a bristlenose pleco. I have had him for about 8-10 months and he is know around 10 inches. When I got him he was only around 4 inches. I use a Marineland bio-wheel filter and keep the temp around 80 degrees. I feed him just about anything he will accept. This include freeze-dried krill, brine shrimp, tubifex, plankton, frozen bloodworms, and beefheart. I tried to feed him guppies once but he payed no attention to them. I was wondering if anybody knows what else is good to feed them or how to get them to eat live foods.