Angelus Gaston wrote:You can house other fish with a male betta ( wouldn't recommend females as they can still fight to the death).
I'm not getting a gold fish for the tank as it's to small ( I only house gold fish in a pond as I don't have a large enough tank ). I'm planning on getting some mollies and a few other schooling fish the betta can't eat ( to match my sunk ship theme)
I have done a ton of research on what can be kept in a betta tank and the lads in the fish department will tell me if I can't.
I don't recommend always trusting fish stores - sometimes staff aren't knowledgable. That being said, you
should be fine with a male betta in a community - but to be safe, make sure you have a back up plan. Some bettas are very territorial and hostile, and won't share space with any other fish. I'd suggest either knowing you can return the other fish, or having a second tank for him if he turns out to not be friendly.
As for tank mates, I'd recommend platies over mollies, as they stay smaller and should be more comfortable in a smaller tank. Make sure anything you get doesn't have long fins, and isn't nippy! 12 gallons isn't huge, so there's not a whole lot of things that would fit comfortably. You could possibly look into ottos - I'm not sure the minimum tank size for them, but they're small shoaling algae eaters and I think they'd look nice with platies and a betta.