I thought it was safe to
keep females together. I recently acquired a female betta and
I put her in my female community tank. In less than 1 hour, 3
females were torn to shreds and there is plenty of hiding space.
I'm missing the "?" in the above submission. As in ' what
was the question?' :). So I'll fill in the blanks and add this
sentence: "So is it safe or is it not safe to put female bettas
together?". Since your
submission got picked by the Gods of Randomness ;) and since you are
bringing up and interesting topic, I figured I would not disqualify
you for not 'really' asking a question and address the issue.
There are a few facts to learn about female bettas (most of which can also be applied to female humans LOL.
In closing, it is obvious to me you got a very dominant female that completely destroyed the established balance and harmony of your harem. I bet she was fully matured, possibly on the large side. Such a tyrant will chase other bettas around even if you have some plants. Although in time the chaos might subside, some of your females might by then be too hurt to fully recover (or even die from too much trauma & wounds).
So is it safe to have female bettas together? If they were raised together, yes. If they are young and of similar size, probably. If they are of different strains, different age and different sizes, not always. When adding a new female, always keep a very close eye on your tank for a few days to see how it goes. If the new female is a trouble maker, place her in a betta display inside the tank. This way she is in there but unable to get to the rest of the peaceful population. A little pecking is OK, but too much pecking is dangerous. So caution is always a MUST! I hope this helps all of you make sound female accommodations decisions.