2 week old guppy fry?

I would wait another week just to be safe.

Ok first of all you need to check of those guppy fry aren't small enough to be eaten if you estimate the size and compare with your largest fish's mouth and it seems big enough then don't put it in the water no matter how many weeks it is size is important because I don't think your guppy fry would want to die now would they? Another thing is that guppy fry are very sensitive to water changes no matter how cautious you are about them you must wait until they are at least at the juvenile stage which is when their colors begin to appear and that their large tail fin is finally visible enough to the human eye.

I would wait maybe til they are 6 weeks... I have a month old guppy fry and they are still separated. Also depends on other tank mates:) just make sure they can't fit in the adults mouth! Hope I helped!

At two weeks they are still too small. I usually wait until 6-7 weeks.