Join Date: Sep 2006
Location: Northern Virginia
The thing about bettas and tankmates is that every betta is different. An otto or 2, some small schooling fish (rasboras or small, peaceful tetras), 6 of the smallest cories (C. pygmeus, hasbrosus, or hastatus) or 4 of the next to smallest (C. sanjuan, guapore, or panda), might be fine. An ADF or 2 should be fine. Mystery snails are no problem.
All this said, keep an eye on things. If the betta goes ballistiic on the new addition, have a bail out solution. If you go with smaller fish, make sure that you have some nice heavy plantings for them to hide in when the betta chases them.
Logic is only the beginning of wisdom