I think ( in my opinion ) that if your going to move them in there tubs I would think possible setting some towels or something in the tubs to help them prevent bumping around and feel liek they are safer also I think it help keep heat into the tubs once the warmed up. As for breeding them i also think it would depend on how far alon they are possible and such details. if they just starting to build follicles and such might get lucky . I would think that the less the bounce around and such they happier and less stressed they get.