I like the Synodontis Ocellifer, but it gets a little too big (8") for my tank. I am looking for more in the 4" to 6" range.
Ghost shrimp are neat little critters, but would just end up as fish food in my tank. I would end up with happy Cichlids though.
And the last time that I had a Pictus cat, well lets just say that I learned about the horrors of ick and the need to quarantine new fish. I am still hesitant to try them again.
Now, the upsidedown cat or Synodontis nigriventris is an interesting cat. I have read that these are also very effecient egg eaters. Eggs I can handle, if they leave the fry alone after they have hatched. Anyone have experience with these?
I forgot to mention that I am looking to have a group of 6 or so.