When Can Angel Fish Pair Off?

[sic0198]

At what size/age can Angelfish pair off at? I have 2 a black one and a koi, and they seem to be swimming together alot. A 50 cent piece is about the size of both so they are babies.

 

[Colin_T]

6 months onwards but usually 8-12months before they pr off properly. Body size should be 50cent piece or more.
Warmer water (28-30C) will help them grow faster but will also cause small fish in the tank to age quicker as well.