I know he wasn't a betta, he was a chinese algae eater, but I only got him a few weeks ago. I decided that the tank wasn't decorated enough, so I added a toy made out of a coacoa pod and coconut fibers. the next day, the water was really murky, so I did a water change. as I was adding water, I saw him. When I got him, he was really shy. but after a couple days, he started becoming active.