What size is your tank? 5 gallon
What temperature is your tank? 80F but I turned the heater down a notch today
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? Gleep the moss ball
What type of food do you feed your betta fish? mostly NLS Betta Pellets with frozen brine shrimp/bloodworms as occasional treat.
How often do you feed your betta fish? 2 pellets in the morning, 2 at night. Fast on Mondays.
How often do you perform a water change? Whenever ammonia reaches .25 ppm or once a week. In the last two weeks I've done 3 changes.
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? Usually Prime, but today's change I added API Stress Coat. I also use API Leaf Zone.
Have you tested your water? If so, what are the following parameters?
pH: 7.3-ish, was hard to tell
Symptoms and Treatment
How has your betta fish's appearance changed?
Flambé is a crowntail. A few days ago I noticed the tip of one of his caudal "rays" was looking a teensy tiny bit ratty - like little pieces were missing here and there. I looked for red or black lines and didn't see anything. I thought perhaps I hadn't noticed it before and he might have just come like that.
Late last night I noticed something cottony trailing off the tip of a caudal ray. It was tiny, maybe 2 mm long? It was too late to do anything so I left it till this morning. This morning the cottony thing is gone. I did the water change and added Stress Coat because I heard it helps regrow fins.
I flared him just now with a mirror and the tips of some of his caudal rays are looking translucent. I can't see the ratty fin anymore but that doesn't mean much - he wiggles so much that I can't get a good look. I also noticed that two rays look stuck/clamped together. The rest of the caudal fin looks fine. All his other fins seem fine, too.
How has your betta fish's behavior changed? So far, nothing out of the ordinary. He's still swimming around, exploring, eating well.
When did you start noticing the symptoms? Two days ago
Have you started treating your fish? If so, how? API Stress Coat
Does your fish have any history of being ill? Not since I've had him
How old is your fish (approximately)? No idea. But he's big so he must be an adult. I've only had him 2 weeks.
Here's hoping this isn't anything out of the ordinary and I'm just being paranoid. Any help would be greatly appreciated!