I also have a 5 gallon tank that is almost done cycling (I think). I do the 50% changes with him in the tank. I moved his decor around yesterday and all this stuff flew up from the gravel, so I did an 80% change plus a gravel vac. I put him in a cup for that and he did the same thing. I think he just didn't appreciate going from 5 gallons to a small cup, haha!