I'll force the issue when the new bag of feed arrives. I do know there is an interesting dynamic between food deprivation and choosiness that will need to play itself out, it might take a few days.
Every couple of days one of my larger SMB grabs a finger tip when when I'm dropping pellets in the tank.
One thing I have noticed is that with big water change outs also comes significant drops in the tank temperature, it seems like an 6-8 degree drop in tank temp really seems to put them off eating for several days, so I avoid doing it.
