I got a betta just over a week ago and he's wonderful and seems healthy. His fins are in great shape, etc. The only thing is his gills are black and I've just noticed a slight red area on each of his gills. Is this a sign of sickness or is it normal? Tank Conditions: 3 gallon, old heater wasn't working so he went 4-5 days without a heater (now 78 degrees). I don't have anything to test pH but I change half the water once a week and did a 90% water change today. I feed him bloodworms and flakes. I'm not sure is he's glass surfing or itching his gills. Also, are the brown spots on the top of his head normal or a symptom of sickness? I just want Captain America to be healthy and happy.