Strangely two golden mollies chase each other and all other fish wildly except black molly females. I bought two black molly females and one female delivered 14 fry in a week. The fry grow very quickly and almost double their size in about 9-10 days. I have lots of algaes for them to nip on and also feed them Hikari Fancy Guppy Food twice a day. For the first several days, I feed them First Bite.