I finally got the 10g tank cycled so I bought a male betta an 6 harlequin rasboras. The betta has shown no interest in the food, but goes after any rasboras that get too close. So far I've found two dead with bites taken out of them and one has vanished without a trace. I'm probably going to move them into the 47g tank if the parameters are good, but I don't want the betta to be alone. What could go in a 10g tank that's small enough for me to have a small school (at least2-3) but big enough to not be eaten? Should I continue with my plan of adding a pair of ADFs?