I only have one small male(around 350 g.) that is locking up at the moment, and I do believe the only thing I did was put him in the tub with the female. In the past I have tried to get small males to breed, but only a few have accomplished it for me. I guess its just up to the individual balls attitude towards the female. I do not put my balls through a "cycle" for breeding. They are kept at the same temps year round. If the little male is ready he will do the deed, but if not just grow him up a little longer.