Dwarf livebearer as in mosquito fish? Heterandria formosa?
They like a densly planted tank and slightly alkaline water, somewhat like guppies, they are the smallest livebearer so are usualy best kept in a species tank and fed as varied a diet of possible (omnivorous). They breed like most livebearers and are peaceful but often regarded as food by larger fish and shouldn't be kept with anything larger than a guppy. As I said, a species tank is best and the fry will need to be fed BBS, liquid foods or microworms as they are normaly too small for powdered flake. They don't realy have any special requirements other than due to their small size.
