Join Date: Oct 2010
Location: British Columbia, Canada
I think you should be okay with those fish in a 20g, make sure to add the other fish first so the betta doesnt have time to set up a "territory". If you add the betta first then he'll be aggressive 'cause he thinks the others are all up in his grill. XD Even so, he may still be aggressive, it depends on the fish but if he is just get another tank for the little gaffer. :)
1 Male ~ 5 Females
3 Bronze Cories
Soon, 1 cornsnake!