Hi OFL! My betta Josh likes to 'patrol' just the front of his ten gallon. It's heated and filtered. Is this just his 'hobby' or is something bugging him? He also seems to have an affection for a corner of his tank. He seems to like swimming up and down that wall/corner. The tank is half lit, and he seems to prefer the darkest corner, but when I turn of the light, he still stays there.He's active, eating, swimming, and normal, I was just wondering if this is bad or just his behavioral patterns. Thx in advance!