Originally Posted by Littlebittyfish
Keeping one betta in that tank without the divider would be fine...But I would get another tank or critter keeper for the other betta. 1 gallon is too small to divide.A one gallon cannot handle that sort of stocking..2 bettas. I personally don't recommend dividing anything under 5 gallons..It is too stressful for the bettas...even if you added a cave they wont be able to get out of view of the other betta.
Definitely agree with this. :) I'm probably more on the conservative side, in that I only feel comfortable dividing a 10g into 2...because in my own personal opinion it gives alot more territory for both, and more options for deco breaking lines of sight. I don't necessarily think it's wrong to divide a 5g, it's just out of my comfort zone; unless you maybe have very laid back fish (which I never seem to end up with).