Endler's livebearer

I've kept Endlers for over a year now bought from a local auction. Great little fishes, easey to keep I"m getting about three females for every male. I've read somewhere that temp. or ph plays a part in the sex of the fry. Breeding is easey they don't eat thier young, Ive notice that the gravid females like to nibble on plants some. I'm am trying to keep the the breeding from son to mother rather than brother to sister. Also looking to add a new bloodline to the colony.
 
AquariaCentral.com