What size is your tank? 5 gallon
What temperature is your tank? About 77?
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? Aqua Culture Betta Pellet Food
How often do you feed your betta fish? 2 pellets a day, every day of the week
How often do you perform a water change? 50% a week, 100% monthly. I haven't been able to do water changes as often as I should, but I have an ammonia monitor now to let me know if it's too high or not.
What percentage of the water do you change when you perform a water change? I answered this in the previous answer.
What type of additives do you add to the water when you perform a water change? Top Fin Water Conditioner every time I do a water change, and Jungle Clear Water, but only when needed
Have you tested your water? If so, what are the following parameters? No, but I have an ammonia monitor.
Ammonia: Less than .02 ppm
Symptoms and Treatment
How has your betta fish's appearance changed? He has a tear in his tail, his eyes are a bit larger than my siblings' fish's eyes, and the edges of his tail are more torn than usual
How has your betta fish's behavior changed? Not at all. He's still his usual, bipolar, wiggly self.
When did you start noticing the symptoms? The larger eyes and torn edges have been going on for a little while. His eyes haven't gotten any worse, so I didn't think anything of it, and his tail has been growing back and disappearing again and again, so I'm not really sure if he's nipping or not.
Have you started treating your fish? If so, how? Yes, I treated him with Mardel Maracyn just the other day to help with what I suspect to be minor popeye and minor fin rot.
Does your fish have any history of being ill? Not really
How old is your fish (approximately)? A little over 6 months
This is what he normally looks like:
This is what his tail looks like now:
Is something else wrong with him, or did he just tear it on something? I think he might have torn it on one of the fake plants he has in his tank, but I don't know which one it was.