I have a normal passive betta that would hardly flare at anything but loved to play and be active. Recently I got a larger tank with 5 fish and a snail(ten gallons) there is a common pleco that is about 2 inches long a kissing fish and three fish that have whiskers(forgot the name of the species). Bubbles the betta and spot the pleco have made a team of sorts. When bubble is eating or just floating around the pleco will watch and swim after the other fishes when they come near bubbles and when spot is sleeping in his cheese dome bubble flares and charges the fishes that get to close. Is this normal or is the tank to small?