i know what you mean... but there is no such big tank????? when i have a49 gal tank, i thought it was big already... but it shrink when my fish were fully grown... then i get a 90 gal... it also shrink... and now i have a 220 gal tank but it still look over crowded and overstock!I hope you have a big tank you can grow them out in.
.
If your new to breeding, I would suggest to wait untill they are swimming then put them in another tank.