12-14-2011, 09:22 PM
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I think you will have no problems breeding your guppies, indeed you may have more problems keeping them from reproducing. The baby fish are most vulnerable immediately after being born, because of their erratic swimming. But if they find a hiding spot, they have a decent chance of survival.
I was fishing the fry out when I found any in my community tank and placed them in a separate tank without any larger fish that can prey on them. But if you choose to leave them in your tank, you will lose some, but chances are that a good number will still survive. Of course for breeding purposes, a separate tank would be best. Fry like a slightly higher water temperature than adult fish and they need to be fed many times during the day. Also, if you leave them in the community tank, you may end up with too many fish in the tank and hence and overwhelming bioload.
I read that baby brine shrimp is a good food for fry. I fed my fry "baby bites", which is dry powdered food. They also will eat finely crumbled flake food. That being said, I read that professional breeders who want to breed high quality fish would likely not feed them the same flake food they feed their adult fish.
As for selling your fry to the local fish store...please let me know how that goes. I was told by my fish store staff that my 1 and 2 month old baby guppies will likely end up as feeder fish, since they are not large enough yet to display the pretty colors that would make people want to buy them. Also, even if I waited for them to become adults, I would not even get store credit, leave alone money. I hope you have more luck with that. Perhaps you should consult with your pet store owners if they would consider buying from you before you invest time and effort into breeding.
Good luck and have fun!