06-01-2011, 09:46 AM
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In a ten gallon, I would add some more female mollies to ease aggression from the male.
After that, you can test the water.. The female better might be alright in the tank. It depends on the 'personality' of the fish. I've seen male bettas in community tanks, but it's really a longshot and I wouldn't even try. (I just moved my male betta to a 5 gallon tank of his own, and he's really active. It's like he's a whole different fish.)
Swordtails like to have space.. I doubt they would be happy in a 10G. I would just add a variety of mollies of different colors.
Beyond that, I see no problem with a mystery snail, nerite snail, or some other nice one.
Shrimp will not survive with a Betta- it's their favorite food.
I would vacuum the gravel wherever you don't have plants. I never vacuum my gravel anymore, but I have plants everywhere. Just do a 30% a week or so, and that will be plenty.