How would you rank them in order from the most simple to the most challenging to keep a breeding population going?
In my experience, I have little to no trouble with keeping endler and platy going. My white-ish swordtails look like they're heading in the same direction with their fry growing up quick.
It's the mollies I had trouble keeping for some reason, they don't seem to fare well as other livebearers in 200L tank full of java fern and moss. They just kind of slowly vanish without leaving any offsprings. Is there something specific to mollies care that I wasn't aware of? Supposedly their care should be same as for other livebearers, but it didn't feel like the case for me.
Apart from guppy, platy, swordtails, mollies, and leopardfish, are there other type of livebearers available in New Zealand? I read about halfbeaks in older topic but I don't think I ever seen them in aquarium however. Gambusia is a major no-go for obvious reason