Originally Posted by Neil D
The puffy thing is called flaring. If the light is on in his tank, and it's dark outside of his tank, he will see his reflection a flare. A betta on the bottom is usually cold. Get that heater ASAP.
Thanks for that, I actually don't have a light for his tank yet I'm waiting on it to come in because when I ordered it I didn't realize it wasn't in stock at my local pet store they said it would only be a few more days. I have been noticing that his tank heat fluctuates with the temp of my room, so if my room is hot his tank is hot, so I tend to only let my room cool down a bit so that it matches his tank.