What size tank does the 10 gallon equate to? (2ftx1ftx14inch?)
It must be fairly small?
For something like a pair of kribs you will need at least a 2ftx1ftx14inch.
I guess you could try one variety of shell dwellers eg neolamprologus multifasciatus or brevis or similis.
I think you can safely say it will have to be a small variety and not many of them to give them the space they will require.