I would have to say any question that starts with "Can I". The way I see it, there are almost no absolutes in this hobby, only odds of success. "Can I keep a mandarin in a 29g tank" - yes, one or two have done so, but hundreds have failed. So can you - yes, it is possible. Odds of success? Maybe 1-2%? I personally think that giving odds like this instead of yes or no answers would be much better information.