Bangaii Cardinals.

[Roy G. Biv]

I bought 10 Bangaiis today. I dont have an eye to sex them, but I tried my best. I think I have 5M and 5F. How long does it take or them to pair off?? Day, week, month??

 

[FMarini]

it will depend on age, they become sexually mature between 6-8 months and will pair up then.
Just be prepared to pull out fish once a pair forms, the paired male will drive off competitors and eventually kill them off