First read about them here to make sure they will do well in your water: Platy (Xiphophorus maculatus) Profile
I would say a group of 10 would be plenty because they are live bearers and will multiply pretty fast that way you have extra room for the fry.
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Tropical Fish Keeping
597.8K posts
83.7K members
Since 2006
forum community dedicated to tropical fish owners and enthusiasts. Come join the discussion about species,breeding, health, behavior, aquariums, adopting, care, classifieds, and more! Open to fish, plants and reptiles living in freshwater or saltwater environments.