Funny story. For the past few days my betta has been driving me nuts, he keeps swimming in verticle circles at the back of his tank all day. I couldn't for the life of me figure out why he was doing it, just all day up and down in these circles. Every few minutes he'd stop and stare out the side of his tank and then he'd go back to his circles. It's been making me feel seasick.
So anyway, I was reading this and how people's bettas were flirting with things outside their tanks and I looked at my boy when I notice a colorful bottle sitting right where he was stoping to stare. I also remembered it's been there about as long as he's been acting this way. On a hunch I took the bottle away and put one of his fake plants that isn't currently in the tank in the bottle's place.
Now he's stopped the circles for the most part, he does the odd one and then goes to the side then swims all over the tank looking for his girlfriend. I don't have the heart to tell him it was a bottle of water conditioner.