Do you think a properly divided and planted 20 gallon could establish territories enough for two male bettas to co-exist? Just speculating.TallTree01 said:1 male betta is the maximum. They will fit all other bettas mostly to death.
Females you could have a fair few. I think 12 would be the maximum but I'm not sure.
I just meant heavily plant/decorated to encourage two clear territories. Obviously things may not go to plan, but I was just speculating. I didn't mean a literal divider.TallTree01 said:Divided?
If you mean a big wall through the middle so they can't touch each other then yes.
If you mean just with lots of plant cover and stuff then no, bettas are VERY territorial and in no tank size is having more than 1 male betta reccomended. Males amd females are similar.