I know ballon Molly's arn't monsters but wondering if I could keep a couple in a 10 gallon tank with 3 guppys. And also I know both species are livebears so will the guppys and ballon mollies breed. Thanks.
A heated 10 gallon will be fine for balloon mollies and guppies. Yes, the 2 species will breed in a 10 (each with their own species). Provide lots of plant cover if you wish to see any babies survive to adulthood.
