the only thing you need to do with the pheonix worms is make sure the organic matter stays a little damp (two or three drops if it feels dry) They don't need any food just a little water here ant there
with phoenix worms you don't really need to add calcium, they are natuarally loaded with it. They are my new best feeders for all the little ones. Never thought of putting an apple in there though. I'll have to try that one.