First of all, I want to thank you for this great forum and all of the great advice I've discovered on it. It's great to read about caring for betta fish from actual betta owners.
I've had my male Betta fish, Boris, since Saturday. Since yesterday he's been acting a bit strange. When he's not aware of my presence, he seems to alternate between floating at the top and bottom of the tank (mostly the top now). When he knows I'm around though, he's swimming around the tank constantly. Am I being overly worried, or could there be something wrong with my fish? His body and fins look healthy, and I just gave him a 50% water change when I got home from work.
What size is your tank? 2 gallons
What temperature is your tank? 80F
Does your tank have a filter? No
Does your tank have an air stone or other type of aeration? A partially opened jar cover
Is your tank heated? Yes
What tank mates does your betta fish live with? None
What type of food do you feed your betta fish? Pellets
How often do you feed your betta fish? Once per day, 3 pellets
How often do you perform a water change? three times a week
What percentage of the water do you change when you perform a water change? two 50%, one 100%
What type of additives do you add to the water when you perform a water change? tap water conditioner
Have you tested your water? If so, what are the following parameters?
I have not tested the water.
Symptoms and Treatment
How has your betta fish's appearance changed? No
How has your betta fish's behavior changed? Yes, not swimming around much when he doesn't notice my presence.
When did you start noticing the symptoms? Yesterday.
Have you started treating your fish? If so, how? Not yet, don't know what's wrong (if anything is).
Does your fish have any history of being ill? N/A
How old is your fish (approximately)? Just got him on Saturday