About a week ago I noticed overnight that our Betta's find all of a sudden had some holes and tears in it. It does co-inside with me removing a bit of sponge I had inside his filter intake which was slowing the filter flow. I have never seen him bite at his tail or anything like that and as far as I know, we have done everything right with him to make sure he's healthy. Here is our info and a couple photos. Do you think its fin rot or did the filter or something else in the tank possibly damage his fin? The first photo shows what his tail used to look like and the other photos were taken just now.
What size is your tank? 5 gallon
What temperature is your tank? 79 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? NLS
How often do you feed your betta fish? 2x/day 4 pellets each feeding
How often do you perform a water change? 1x 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? stress coat, prime
Have you tested your water? If so, what are the following parameters?
Ammonia: 0 ppm
Symptoms and Treatment
How has your betta fish's appearance changed? the upper half of his tail fin is broken/shredded looking.
How has your betta fish's behavior changed? it hasnt
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? No
How old is your fish (approximately)? not sure, we have had him for 1 month