He is acting normal. Whatever it is doesn't seem to bother him at all.
ETA: I didn't realize how hard it is to see without zooming in on the pictures. I will see if I can get a closer one. The spots are mostly near his tail, towards the bottom of his body.
What size is your tank? 3.5 gallons
What temperature is your tank? Up until today it has been somewhere in the 74-76 range. Today I got a heater and put it in so it's now at 82.
Does your tank have a filter? Yes
Does your tank have an air stone or other type of aeration? No
Is your tank heated? Starting today, yes.
What tank mates does your betta fish live with? None
What type of food do you feed your betta fish? Aqueon Betta Food
How often do you feed your betta fish? 2-3 granules twice a day.
How often do you perform a water change? Once a week.
What percentage of the water do you change when you perform a water change? 50%
What type of additives do you add to the water when you perform a water change? Top Fin Betta Water Conditioner
Have you tested your water? If so, what are the following parameters?
Symptoms and Treatment
How has your betta fish's appearance changed? He is developing black spots on his sides.
How has your betta fish's behavior changed? It hasn't. He swims around like he normally does.
When did you start noticing the symptoms? About a week ago.
Have you started treating your fish? If so, how? No
Does your fish have any history of being ill? Not sure. I've only had him for 2 weeks.
How old is your fish (approximately)? No idea. He came from a PetSmart. I'm not sure if the fish there are usually a certain age or not.
Last edited by Amba1027; 11-11-2011 at 08:31 PM.