Ok, I picked up a pair of A. Melanopus and have had pretty good luck with them. However they have only eaten mysis shrip. I am a little concerned that they are not getting a balanced diet. What else can I give them to keep them healthy? I have tried a couple of frozen foods with no success. If I cant get them to eat anything other than the shrimp would the addition of selcon or something similar help to maintain their health?