The slidder may be tiny now, but they don't stay small. Many people think that they remain small turtles but they can get up to 5 inches. That makes it bigger than the Leo. I wouldn't put them together. : )
::Nope! ;-) The turtle will most certainly eat it. Trust me. Those things are predatous; that's the kindda stuff they eat in the wild, and fish and crustaceans and mollusk--anything they can over power and kill with their beak.