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Old July 18th, 2010, 04:32 PM
MyBirdIsEvil's Avatar
MyBirdIsEvil MyBirdIsEvil is offline
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Join Date: Apr 2006
Location: Missouri
Posts: 1,720
I wouldn't go under a gallon for a betta. Mainly because anything under that will build up waste too quickly, so unless you want to do water changes constantly. I don't believe in making them tolerate foul water just because they can breathe air.

And I would make sure there's more surface area than depth. It's more important that they have room to swim side to side rather than up and down.
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