Ditto, I find it easier to select good stock after 6 weeks than at 3 months where they start to nearly catch up to each other....
But the "alpha fish" will always be that little bit bigger and more dominant. One way of getting the colour to come out, is to stunt the fish.... bad idea. but I have two tanks full of examples of fish born 5 days apart.
The big ones are still pretty pale, (rainbow platies), the small ones, a 3rd their size, are just about fully coloured up already... but they are retards. (it was an experiment that went a bit far, but now I know the importance of initial food sources as well as keeping water conditions pristine).
Cape Town, South Africa.
Hi. I'm back.