Hello all! I have a 10gal sorority that a few people on here helped me set up about 3 months ago. I have four female bettas, two crowntails and two veiltails. They have been doing beautifully. Unfortunately, one of my crowntails appears to have gotten beat up overnight. For the past two days she wasn't going to the top to get food with the rest and I was concerned they were bullying her out of it. I saw no for sure signs so I put her on "betta watch". Magically overnight it appears that she got beat up by someone because she has a couple of chunks missing on her tail and she's just laying on the bottom of the tank.
I have since taken her out and put her in a QT for treatment. My question now is that I am left with three fish. I have been told this is a no no and although they appear fine for now I am worried that soon there will be another girl getting ganged up on. What is my best action here? Although it would be very pricey to split them all up, if I must then I will. Has ANYONE had success with just three girls?