| http://www.w3.org/ns/prov#value | - i have mine in a 1.5gallon setup and he seems pretty happy and content.i would say 1 gallon is the minimum especially if space is limited(eg. college dorms,etc.) but otherwise 5 or more would be better. but this all depends on your funds and space available. i think this also depends on the betta. i definitely wouldnt keep it in those little jars or pints that they come in..
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