Hi guys, so last night I noticed that my betta Gimli had what looked like scratches on his back. This worried me, but I thought maybe he had gotten himself between his filter and sponge baffle and scratched himself against the sponge somehow. Well I moved the baffle so it's harder for him to get to, but this morning I checked on him at he has a big, shiny whitish silver spot on his head. I have no idea what it is. I can't tell if he's missing scales or has some kind of disease, so I was hoping some of you knowledgeable people could help me identify and treat it...He's in a filtered 5 gallon with a few live plants and silk ones, and I just recently added a snail to his tank, if that means anthing. Also, no heater right now since I live in AZ and it's still warm enough to keep the tank at 81-83 degrees with no heater.