My experience:
For feeders you've got to start big or it's pointless. Grab about three males and about twenty females and jump-start a tank of around 40 gallons. Add tons of floating plants, live bacteria from an established filter and feed twice a day and you'll actually get enough fry for it to make sense.
For breeding, it's totally up to you on how to do it, but to fix a trait into a strain that will breed true in less than five years it supposedly takes at least seven aquariums to juggle parents, backcrosses, growouts and other places in the genetic stepladder. Makes sense to me. I've always wanted to see the colors on the wild feeder guppies translated into full blotches, but all the fancy guppies I see around totally fail except for the ugliest colors, red and yellow. Why they got those to translate but have no luck with blue, green and purple baffles me.
Also, guppies grow faster and look amazing when raised in lightly brackish water.
my wife breeds guppies, we started out with a 30 gallon and now she has 5 tanks, it keeps her busy and one day will keep my rtc full lol, of course i will get the mutts and the culls from the pure strains, heres some pics of some she has. http://s1012.photobucket.com/albums/af243/bbcmommy2010/Guppies/
These are some of my Endler/Guppy Hybrids (originally from Petsmart), hoping to bring out more of the Endler colours by breeding one or more of these back with Wild Type (N Class) Female Endler(s).
That's assuming they aren't sterile, if I'm successful maybe I can sell some back to Petsmart, I think they look a lot nicer than the guppies they usually have.
Guppies are a small, but effecient feeder........The Convict cichlid is a lot more prolific and the fry are way larger.......Try breeding Convict cihlids over guppies......Get a 10g tank....No substrate is needed.......Place a 4-5 inch flowering pot on its side so they can lay the eggs inside..After 3 days, the fry will hatch.....The first two days, the fry are known as wigglers, their yol;k sacks prevent them from swimming.....Once the yolk is fully digested, the fry are ablt to sim, this is when they are called free swimmers.........This is the stage they are able to eat bbs, baby brine shrimp.......Grow or purchase the bbs LIVE and directly feed them to the fry........The fry will grow rapidly with two to three feedings a day..........After the second to thrid week, the fry are ablt eat and digest crushed flake or pounded pellets...........
thanks. she enjoys breeding the guppies and its just an added bonus that i get the culls and such for the rtc. after the beginning of the year she will have 4 pure strains and some mutts. so there will be plenty lol