Hey, What id recomend as a food diet is Earthworms (I prefer to cut them into 3 sections) and keep feeder guppies or someother livebearer in the tank. These fish are some of the cleanest eaters and will keep your bacteria levels up (can feed them easily off Javamoss at no expense of your own). These fish are also surprisingly healthy as food. By haveing these cheap fish you wont lose anything of value as the caecilians slowly eat them when their hungry. But keep them on a staple of earthworms. Hope this helps.