Expect stored sperm
Females may produce multiple broods after one mating. Separating a female from males does not guarantee that breeding has stopped immediately.
Protect fry without trapping adults
Dense plants, floating roots and prompt fry transfer can reduce losses. Long confinement in a small box can stress the female.
Separate sexes in time
Juveniles may mature early. Learn sex differences and move them before another generation begins.
Plan repeated output
A single female can produce more than one brood. Your capacity plan must include the next brood, not only the current fry.
Keep lines transparent
Guppies and Endlers, and some Xiphophorus species, can hybridize. Label crosses honestly.