If you want to house females together get a heated, filtered, densly planted 10 gallon tank. Put 4-6 females in the tank and moniter closely, they will fight for the first few weeks.
But keep them seperate, I've had some pretty nasty females rip each other and males to shreds.
Who am I? Well I am a Junior Member of the International Betta Congress and a breeder of white HMPKs, red dragon HMPKs, black/red dragon HMPKs, metallic multi HMPKs, blue masked HMPKs, and now multi color HMs. Soon to add black HMs. I will be showing in New Breeder class in fall of 2012.