So to start...
What size is your tank? 16g
What temperature is your tank? Between 76 and 82.
Does your tank have a filter? Yes, but not in use- current is too strong, working on a fix.
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? Freeze-dried blood worms. Can occasionally persuade him to eat a pellet or two.
How often do you feed your betta fish? Every other day. Sometimes snacks in between... I have no restraint.
How often do you perform a water change? Weekly.
What percentage of the water do you change when you perform a water change? 1/4th.
What type of additives do you add to the water when you perform a water change? AquaSafe water conditioner.
Have you tested your water? If so, what are the following parameters?
Ammonia: I have test strips. After today's water change, I tested to be sure I'd thoroughly cleaned the tank. The reading was 'Ideal.'
Symptoms and Treatment
How has your betta fish's appearance changed? His tail and bottom fin are damaged at the edges.
How has your betta fish's behavior changed? Slightly more active?
When did you start noticing the symptoms? Just now when I came in to look at him.
Have you started treating your fish? If so, how? No
Does your fish have any history of being ill? Not that I know of- I've only had him about a month.
How old is your fish (approximately)? Unsure...
So the scoop is this- I changed Mongkut's water today because the ammonia readings were starting to look iffy. I did a 25% change, which has never bothered him before. I'm very careful about water quality.
I went away for a couple hours to have dinner and catch a couple TV shows. When I came BACK, he greeted my in his usual fashion- swam to the front of the tank and flared, then turned away and drifted off when he saw that I am firmly on the other side of the glass. Then I noticed his poor fins! The edges have always looked a little... odd. The closest similarity is tissue paper, the way they're thin and faintly translucent at the ends. I was mildly concerned that maybe it was early fin rot, so I decided to keep tabs on it. But I come in and his tail is just terrible! Multiple small slits in the end, and in the bottom fin an entire chunk has been torn and left hanging!
And the big split in his tail was almost done healing, too! T_T
Somebody please help my fishie...