Ok, I guess after stimulating him with live brine, I tried Hikari frozen brine again. I scooped up a coffee cup of tank h20 and thawed cube before introducing them to tank. As soon as I poured them in he went nuts popping them. He even is going around tank plucking ones that sank to bottom. Now, How nutricious are these frozen brine. Package says that they are "Bio-Encapsulated" with multi-vitamins. b12 etc.... At least he is eating something while I search for baby gupps.