How Old?

[abi]

How old do guppies have to be to breed?Is it three months?

 

[backtotropical]

Guppies can breed after about 1 month, although if an older male is in the tank with fry, it is thought that the older male can fertilise females even younger than 1 month. This should be avoided if you can. Breeding too young is thought to undesirably stunt the growth of the female, and so reduce the size of her fry. I believe it can also lead to undeveloped fry which can have physical differences from normal guppies (like having premature babies).

 

[clinton ><>]

if you have 1 female guppy thats has fry can the fry breed with eachother like brothers and sisters

 

[JamieBailie]

if you have 1 female guppy thats has fry can the fry breed with eachother like brothers and sisters

Yes, But as said, They generaly are not the most healthy fish.

 

[abi]

Thanks for the info!

 

[Davidtq]

if you have 1 female guppy thats has fry can the fry breed with eachother like brothers and sisters

Fish are not at all fussy about things like that. Breeding guppies back to their own parents or grandparents or brothers and sisters is the way most fancy guppy strains have been stabilised. Ive got a strain of guppies going from some fish I brought about 6 years ago there must have been a good 20 generations without any new blood, no health problems yet.