Sooner or later the male would bring the female to death. I tried once a well structured 240 lt tank for one pair of blue crowntail, some Poecilia as sparring partner included. All went well for half a year, spawning successful. Then there was not enough place for the female, the male put her down.
In general: it doesn’t work in small tanks, in larger not in long terms. May be, there are more peaceful strains, but I really haven’t met one in fifty years.
Keep them seperately; bring them together for spawning and seperate them again.
It doesn’t work with 1/3-5 either.
Interesting is, that trade tries to sell pairs. Cheep females going at a price as for males?
Cheers Charles
