Ok, so I'm re-setting up my tank and to test it I got some feeder guppies because they are the most similar in temperament and durability as the platys I was planing on buying, and really cheap. However after some reading I think I want to stick with guppies for the time being. I have a few questions about them that i could not find answered anywhere online, at least on with any assurance. For one, what makes them different from other guppies? Is it just that they are not as 'fancy' and because they are so prolific there are so many of them it is cheap to make them feeders? Also are they just adolescent guppies that will grow to the size of regular guppies or are they normally just a smaller fish than other guppies? Either way, at about what size should I expect them to reach sexual maturity?
Thanks for all the help!