I've kept male bettas in 10-20 gal community tanks a number of times with no problems (one betta per tank, obviously) -- you need to avoid very nippy companions (e.g. zebra danios) as they can be hard on the betta's fins, but honestly I have found them to be quite good citizens around yer basic community-tank tetras etc. And it's certainly a nicer life for them than a weenie little glass globe
People can rationalize all they want about "bettas come from small stagnant mudholes with poor water quality", that does not make it true. There is NO SUCH THING as that small of a persistant body of water in nature; wild bettas (although fish-store bettas are soooo far removed from their wild ancestors as to be almost a differetn thing) normally have vast room to move around compared to a little globe; and although their natural bodies of water dry down during some of the year and are not great water quality, they are not *always* that way, nor does it make it a good idea to push the limits of their physiological tolerance.
JMHO,
Pat
People can rationalize all they want about "bettas come from small stagnant mudholes with poor water quality", that does not make it true. There is NO SUCH THING as that small of a persistant body of water in nature; wild bettas (although fish-store bettas are soooo far removed from their wild ancestors as to be almost a differetn thing) normally have vast room to move around compared to a little globe; and although their natural bodies of water dry down during some of the year and are not great water quality, they are not *always* that way, nor does it make it a good idea to push the limits of their physiological tolerance.
JMHO,
Pat
