you method is certainly very effective to achieve high quality shrimps cleeon.
having selectlvely bred animals all my life and having a scientific education and a curious mind,
and having studied the published strategies to improve the desired caracteristics of domestic animals
i follow the low intensity selection for long term steady improvement of a given population without losing genetic diversity
so i keep a few desirable adult males in each aquarium an all the females excepting any one that shows a defect .
I am always on the lookout to identify the young males from the young females, to cull the non desirable ones and let reach maturity only the very good ones
this way i have a lot of babies to choose from, and , as the older generation dies off, gets gradually replaced by a noticeably better generation still maintaining a wide genetic diversity
i have to point out i breed red pinto, thus caridinas, no much problem in culling early because colour and markings show from a very early age., the dificulty is to tell males from females before they are ready to breed, that is why i am particularly vigilant if t catch them in a breeding frenzy, to spot the youngsters that chase the mouted female, asumming those are male youngsters