Okay, I have never had experience with tail-biting so I'm not sure if that is what's going on..
Basically, I checked on my boy tonight to feed him and check on him, and all of a sudden, his tail fin is all torn up! This happened within 24 hours.. I don't know what's going on?
There are photos attached.
What size is your tank?-5 gallons
What temperature is your tank?-76 degrees
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?-New Life Spectrum or something like that?
How often do you feed your betta fish?-Every day, fast him one day a week
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 percent
What type of additives do you add to the water when you perform a water change?-water conditioner
Have you tested your water? If so, what are the following parameters?-I haven't tested yet, but typically my levels are all normal
Symptoms and Treatment
How has your betta fish's appearance changed?-His tail fin is all torn up. :(
How has your betta fish's behavior changed?-It hasn't.
When did you start noticing the symptoms?-Just 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've had him for about 2 months. (He came from a pet store)