First, the stats:
What size is your tank? 3 gallons
What temperature is your tank? 80-82 F
Does your tank have a filter? Yes
Does your tank have an air stone or other type of aeration? No
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? Hikari Bio Gold
How often do you feed your betta fish? 2x 3 pellets
How often do you perform a water change? 2x week
What percentage of the water do you change when you perform a water change? 25%
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? No
Symptoms and Treatment
How has your betta fish's appearance changed? The ends of his fins seem to be curly slightly and getting darker.
How has your betta fish's behavior changed? He stays in the back of the aquarium between a submarine and a plant where I can't see him. and tries to get behind the filter. He also spends a lot of time swimming near the filter but seems to get pushed around by it.
When did you start noticing the symptoms? Today
Have you started treating your fish? If so, how? No
Does your fish have any history of being ill? No
How old is your fish (approximately)? I got him a week ago from the pet store, so probably a year or so.
Also, his water was cloudy when I came to feed him so I got him out of the tank and did a 15% water change. It's still cloudy but I'm rather concerned about his fins and what the filter is doing so I've turned the filter off. I've noticed that he seems in laps around the backside of the tank seemingly trying to escape or something. I'm wondering if he can see his reflection and that's causing problems for him.