I never had trouble getting the 3 i had to feed on bloodworm but it was a problem feeding them enough to get any weight on them, ideally they need to be fed 5 or 6 times a day if all they are taking is bloodworm as it contains very little protein.
Now i've got a bit of tankspace i might try some again, the last ones were victims of a polluted tank while i was away for a few days after one or more of them chucked up the last meal of whitebait tails i fed them
im feeding them 3 times a day and thats the most i can manage so hopefully it will be enough to get them growing well
they are thinking about taking bits of prawn allready and it will be a lot easier to bulk them up once they do
shame what happened to your ones you should definately get some more with the room you have