I could tell you but I'd have to kill you...Are the worms you are feeding live? Where do you get them from? Also where are you getting the freshly frozen mussels? I need to look into getting better foods. So far I only feed a mix of these.
Joking aside, I'm in the UK so not much point sharing sources I'm guessing?
For the record I get blackworm from a FW buddy down the road, mussels from the north Norfolk coast (they are live, sold in bags outside people's houses... I just chuck the bag in the freezer at home).
I also make my own food... whole fish, guts and bones and all, seaweed, omega 3 capsules, shellfish... whatever I can get hold of in the fishmonger, blend it all up and freeze it.