yeah make sure there are TONS of hides, if you can i would move them to the 125g now, that would give you a better chance of a female surviving. i had a lot of tiny festae fry (like less than 1/2in when i first got them) and before they were even an inch i was down to 2 or 3 and by the time the largest was a little over an inch he had stressed the last two into dying (they would all gang up on the smallest fish and then once it had died, moved onto the next smallest), and this was in a 30inx12in 20g tank with caves and plants, they are really brutal to each other so its really depends on the fish, i would say as soon as you see them being overly aggressive or all ganging up on one fish, then either separate them with dividers, or put them in the 125