Thank you for the competent answer!
Yes, the example with the quindecim is very impressive!
And, by the way I didn’t think about the expert breeders, I thought about beginners as me, who have two or four fish, and begin to give the offspring away, the best by the project distribution.
Comparing with men and dogs, I was thinking that then it would be nececary to take for example a male from one small stock and a female from another small stock….
But implied, that we (the beginners, the experts know anyway!) take a good care for our fish and don’t set together ill fish-parents, it’s good to hear that it’s already proved, that also a small aquaristic population can stay healthy! 🙂
With my former fish from the “hobby” I always had to look out, for example with the good old guppies from my friend, we always look out to get “fresh blood” so everybody is astonished, that we always have healthy offspring …