Here is a pic from years ago of a happy live bearer aquarium that I kept. It was 12 gallons, housed about 26 guppies(2 female to 1 male), about six pair of platies, and a pair of mollies. The plants are Amazon swords, arrow wort (broadleaf and dwarf). I changed 1/3 of the water every 3-4 weeks. Hmmm. I may start another live bearer tank.