I'm thinking about getting a 36G which I'll be transferring my betta and african dwarf frog to. I want to get a small group of otos (4-6) but I'm at a loss as to what else I should/can put in there. I'd like to get some schooling fish but I'm at a loss as to what would be okay with the betta.
He get's on with the frog well enough (they occasionally bump into each other but then head the opposite direction or the frog plays dead, pretty cute) but I'm not sure if that's a sign that he'd do well with any other fish. Any advice would be greatly appreciated.
EDIT: Any filter or heater advice would also be handy.