I found some upside down catfish(synodontis nigriventris) at my lfs. Would they work?
I've kept those and actually want to have them again.
I thought you wanted surface dwellers?
Those fish like to hide in caves or under leaves or driftwood, at least in my experience. I've read that in groups they come out more but I don't think they spend much time at the surface except to feed. They also will turn themselves right side up to eat as well.