I have a 55 gallon tank that's not being used at the moment. We had saltwater fish for the longest time, but now it's empty and taking up room. I'd like to use it for the bettas I have somehow, but I'm not sure what a good setup would be. I could divide it up, but how many divisions should I have and could I keep a sorority in one of the divisions? I'm looking for some ideas! Please share your thoughts!