Yeah, mine never seemed to enthused about brine shrimp either. They go crazy for the blood worms and almost as enthusiatic about the tetra flakes. I originally put mine in an already established tank that had a few tetras, danios and a pleco. I took the tetras out but left the danios in the first night. By the time i came home from work the next morning to return the danios and tetras to the LFS, the danios were gone. The pleco is doing fine except they take his algae wafers so i just put it inside his rock that he sometimes hides in and drop one in the tank at the end of the night when i turn the TV off. He's pretty much out all day swimming where ever he wants. The Ps notice him but rarely approach him excpet to steal his food. I have a shot of him on my phone swmming upside down and one of the Ps looking up at him