picky discus fish

Question
HI. I have recently bought some discus fish for my one lonely one and all seams to be going well, kind of. I have had to split my original one up from the other two as the original one (Bandit) has been bullying and has been bullied by one of the new ones, Alba. The one left over, Coalbolt, seams happy enough and we have put up a mirror for him/her as the other two are in a different tank. Bandit and Alba a split up by a piece of glass in the tank.
The problem lies  in Coalbolt because she/he only eats the expensive food and although this wouldn't normally be a problem, it is in my case as pocket money only comes once a month. HE/she only eats frozen mini blood worm and not, flake-food, algae wafers or cichlid food. All of these are cheaper than the bloodworm but Coalbolt refuses to eat them. Alba and Bandit have no problem eating and will east almost anything you offer them!
Is there anyway that I can get Coalbolt to eat the cheaper food?
My discus get fed bloodworm every few days, a mixture of cichlid food and flake food every day, an algae wafer every so often and some times a bit of blanched courgette.
Please help!  

Answer
AJ,

The best way to get a stubborn fish to eat the food you offer is to only offer that food. I would continue to feed him the other food and not offer the blood worms. When he gets hungry enough he will eat anything you give him. I have has a few Betta's do that to me but now they eat everything. You don't have to worry about him starving because he will learn to take whatever is put in the tank.