How Do You Tell?

[abbowilk]

i have about 13 baby bettas, i have heard that you have to split up the male fry or they will kill each other. they have grown quite a bit ( they are 1 and a half weeks old) but i cant tell the difference between the males and females

 

[Jaded12]

you won't be able to sex them until they're are AT LEAST one month old. Do you really think you should be breeding if you didn't know something as basic as that?