two male guppies can put a lot of stress on one female add anther 3 females or more there will be less aggression. towards the same female feed them on live foods there is simply no Better food
This always got mine breeding. I mean they bred on their own but this got them breeding more readily. It's like paradise fish, fed mine frozen bloodworm last night and viola, They started laying in the nest he built. I now have lot's of eggs. Whoa, Sorry didn't mean to go off topic. Yeah guppies breed like rabbits once they start, you can't stop 'em.
Cheers,
Paradise<3!