01-29-2009, 12:03 PM
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A jar or a bowl is a horrible environment for a betta.
1) They need a heater. They are tropical fish that do well in temps of 78-80.
2) Not enough swimming or stimulation. Really, would you want to spend your entire life in one small room?
3) Often inadequate cleaning or filtration. You'd have to clean a 1 gal bowl or smaller every day and that's a lot of stress on the betta.
4) Bettas are not "afraid" of large areas. The only tanks that wouldn't work for a betta are ones that have aggressive or overly active tank mates/uncompatable parameter requirements, and tanks that are too tall and do not have adequate plants near the surface for resting. Tanks with high current are not advisable either because bettas are really bad swimmers. So, yes bettas have different needs just like all other species do, but the betta in a bowl scenario is certainly NOT an acceptable home at all.
I have a mini canister filter for my 2 in a divided 10 gal. I put nylon over the intake and put the outtake tube facing the wall so any current is deflected. It works perfectly. Sponge filters work as well, as does the little azoo that I have on my 5.5 gallon but you'd need 2 for a 10 gallon.