a couple weeks ago i came across some very small pundamilia nyererei(ruti island coloration supposedly) for 2 bucks each. I bought 4 of them and they are now just reaching about an inch. they still all look the same, although the 2 slightly larger ones have egg spots. should i be able to tell males apart from females at this size? I dont want to end up with all males, or worse, all females.