Originally Posted by bobbysgrl
Can I add my Betta, then add more fish later on without the chance of the new fish dying?
While there is always the chance of the new fish dying, there are things that can be done to minimise this from occurring.
Have another tank or 2gal. bowl prepared and ready. This, incase when you add the new females you find that your current female is active to aggressive or one of the new females is acting aggressive. You can then separate for a time, the aggressor. After the rest of the females in the 10 gal. have had a chance to settle in, give it at least several days. You can then try returning the aggressor to the 10 gal.
Have lots of plants etc. in the 10gal. so there will be plenty of hiding places and territories.
Female bettas housed and stocked correctly will usually get along. Some displaying, flaring and chasing would be normal. The personality of your betta, bettas, will be the deciding factor.
These are some of the things that I could think of. There could be more, and hopefully others will be by to correct me if i'm wrong and or to chime in with more info.
Hope I have not repeated info that you already knew.
Best of luck to you, I really hope all goes well, because the female bettas are great. I have 9 in my 75gal. and I just love them they are so funny and have super personalities.