Originally Posted by Johnificent
@emmalea oh... i was thinking of putting two bettas in because i heard that bettas get stimulated and its healthy for them? im not sure, but i heard this before...
It is alright for them to be able to see each other, though it can sometimes cause them stress.
The main issue about that tank is that it is just too small for more than one betta, when split it half it gives less then 1.5 gallons to each betta.
Also though I have no problem with divided tanks at all I think that only larger tanks should be used, with a tank that small it gives you no room to block the divider with plants or for them to have anything to do besides trying to get through the divider. I think you will find they get super stressed out very quickly.
I would just get one fish, or two tanks. :)