Guppy's are easy to breed, but the babies dont get size really really fast, dont get me wrong if you have them in a tank you will end up with a solid tank of guppies. From all the reading and questions i have asked and responses i am going on. I got a group of young cons from 2 differnt stores so i had a lesser chance of inbreeding, and im watching them pair off. They are getting there own 20 long to do there thing, and they are gonna be feeding my larger tank, Ctenapoma's,killis, Barlius, even my Tropheus whack a few live feeders when thet hit the tank. i made a deal with the LFS i work at to take any "excess" off my hands for store credit, not much, but hey anythign to feed the hobby*L*