I'll get to see the new store tomorrow. Hopefully not my last time
My friend said its a pretty nice looking store
One of the breeders on trademe keeps his in 250ml bottles for quite some time.
I used to keep mine in 1.5l bottles
They will fight with each other generally.
The betta barracks animates have for fighters are awesome. More space than what some breeders keep the fish in
They are also tropical fish, not coldwater
With that theory, that tank will house a 30cm arowana comfortably... Which is completely untrue.
Assuming its coldwater, I would just get more minnows after the tank is cycled.