QUOTE(littleone78 @ Aug 17 2005, 02:38 PM)
I think half a gallon is the absolute minimum. What does the jar look like?
He'll need some plants for hiding places. I got a nice 2.5 gal aquarium set from Petsmart for $25 - comes with a filter, I added some plants, its really a nice setup. You can get 1 gallon sets like that too for like $16
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Thanks..I don't think I'd go under a gallon. I've got a 2.5 gallon for my other betta right now and he's loving it. I've already started decorating my jar and punched many holes in the lid. It has rocks and I have a couple plants I can put in it.