Females absolutely MUST be in groups of 4 or more if they are going to live together. They develop a pecking order, and if there are just 2, one will likely bully the other to death. The more females you have, the more the aggression is spread out. I'd highly recommend separating them until you can get the right amount of girls and a good sized tank (10 gallons at least).
Separate those two ASAP. With just two females, one will kill the other or they were both end up killing each other. Females can be just as aggressive as males.
They CAN live together....in a well planted 10+ gallon tank with a minimum of five females. Its called a sorority...and sometimes even in the proper conditions things don't work out.
So you'll need to find a new home for one of your girls, or head out and get another tank.
Wow, call me a novice betta caregiver...or any fish for that matter. They don't tell you these things at the pet store!!
I seperated them...I will likely just get a different tank for the other. They did well togtether for the past couple days, but the fighting started up this evening again. Should I be concerened with their missing scales?
Don't use Bettafix, or any of those 'fix's....they don't do much for that kind of stuff, and they're damaging to the Labyrinth organ that bettas use to breath.
To help promote healing and offset infection, use Aquarium Salt. Use teaspoon per gallon and make sure its fully dissolved. Also, keep the water in both their tanks at a nice steady 79-80 to help promote healing, and perhaps toss in an extra water change....how big are their tanks?
Yup, the thing with females is that they can be fine for months and months even...and then suddenly you wake up with dead fish. Thats why even the proper number of females can be risky. Bettas were bred and raised to fight, both male and female.