I moved my HM betta, Hue, into a 2.5gal tank yesterday and I noticed that he liked to swim by/around the heater and today his behavior has gotten worse. He'll swim around the tank leisurely, and then come back to the corner/side of the heater and then swim quickly in a jerky/twitchy manner down until he hits something, like the gravel, the glass, or the plastic rock formation. He'll pause, not moving any fins, and the repeat this. I saw him do this for at least 10 minutes. He's eating regularly and not showing any signs of sickness that I can tell.
Does anyone know why he might be doing this? Hue's my first betta, so any info would help. Thanks!
What size is your tank? 2.5
What temperature is your tank? 82
Does your tank have a filter? no
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? Aqueon Betta food pellets
How often do you feed your betta fish? 2-3 pellets 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? 100%
What type of additives do you add to the water when you perform a water change? top fin water conditioner
Have you tested your water? If so, what are the following parameters? N/A
Symptoms and Treatment
How has your betta fish's appearance changed? no
How has your betta fish's behavior changed? swimming erratically near the heater.
When did you start noticing the symptoms? yesterday evening
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've had him for three weeks, age unknown