When Do Guppy Fry Reach Breeding Age?

[Deepatlantis]

Hi, I've tried searching the forum but can't find the answer, I apologise if I've overlooked it. Can anyone tell me at what age to separate my guppy fry boys and girls? I'm planning on keeping any really nice ones, but most are going off to my LFS and I don't want the girls to all be knocked up by their brothers!

 

[Skies]

Guppies start breeding between 3-6 months...

 

[Dreamer03]

It can be as soon as 3 months but for sure at 6 months.

 

[DiddleBug]

As soon as the males' anal fin starts to change shape (when you can tell they aren't females) you will want to separate them. This can be around 3 months, but the age varies. Believe me, they don't have to be very big to get a female pregnant.

 

[Deepatlantis]

Ooh, interesting...thanks everyone!