The title pretty much says it all. I got two one a little larger then the other. I have had them for about a month. At first the smaller one ate fine, for the last week I don't think it has had anything to eat. He is looking very gaunt and lethargic, while she is darting all over the place eating and getting fat. I have been feeding thawed Mysis shrimp and New Life Spectrum. Any suggestions as to how to get him to eat?