I have a male betta that I keep in my office at work. I've had the little boy for almost a year now I think and I've noticed something really weird lately. He seems to do worse when I clean his tank than when I let it get dirty. There have been times where I clean is tank and for the next few days he acts like he's dead, but once the tank starts to get dirty again he perks right back up. This seems counter intuitive to me, and I'm wondering if anyone knows what might be going on. This isn't my first betta, but it is the first one to act like this.