Smallest Tank To Keep Betta's In?

[The_Dude]

1.9 gallons... mine is only one tenth away from being 2 gallons so I just call it a 2 gallon.
It works well enough. Oh an if you have more than one fish, it's a lot easier to just type "stock" than it is to name them off. Here, I'll show you.

Example 1 - stock

Example 2 - Tatsu, Bootsy, Whiskers, Paul, Pip
(Bootsy, Whiskers and Paul are corydoras BTW, cat's names are cute.)

See how much easier it is.

 

[SoCalMom]

I have had many Bettas and the smallest I go is a 2.5 gal

 

[stang1]

I've never kept mine in anything less than 5 gallons but I think 2.5g + is fine.

 

[Allie]

my first betta was kept in about a half gallon bowl and he was healthy for the 4 years I had him.