Mine ignores Masivore, Hikari sticks, and any other brand of prepared food I have given it. I fed it krill for the first time in I don't know how long today, and it wasn't even interested in that for awhile. I think he thought it was more of that nasty Hikari stuff again. Only when my angelfish started tearing them apart, did he realize it was "edible". Now to figure out what vitamin to soak in that he won't notice the taste.