For the past few months I've had my Betta in a 1 gallon bowl with a heater and regular water changes, and a 15 gallon tank with some other fish in it which unfortunately got ich and died recently. I'm keeping the tank quarantined for now until the ich goes away, maybe for a few weeks, but I was thinking of maybe eventually putting the Betta in there so he'd have more room and aeration. I've been told that Betta's aren't happy in a space that's too big though. Do you think he'd like the 15 gallon? He'd have a proper filter and a heater, and maybe I could add some shrimp and snails in with him. Or I've heard that small neon tetras are suitable. What do you think?