I recently separated my betta Captain from the other bettas in the sorority when it became obvious that she was being bullied. They all still share the same tank water, but there is a divider that allows water flow.
Even before I separated her, Captain has been looking sick. She still has clamped fin, and I can't tell if some of her fins have been eaten, or fin rot, or what, but her fins don't look good of what I can see. She seems increasingly tired, and yesterday I noticed a green patch on her scales. It *LOOKED* like she might have been getting a different color in, as you could see the texture of her scales, it didn't look swollen or sunken, it simply looked like a patch of green scales.
As of this afternoon, those same scales now look like a grey/black scab that is DEFINITELY swollen and a little rough looking. it really does look like a scab. But here's the weird part: it's on both sides of her tail, in almost the same spot. As if she got her tail pinched and burned or something.
I just did a 50% water change. None of the other fish(2 bettas and 2 tetras, and yes, I know I need more tetras) seem to be showing ANY signs of sickness/stress. Note, a ghost shrimp is the only other creature on Captain's side of the divider. Please help?
What size is your tank? 20G high
What temperature is your tank? 78F even
Does your tank have a filter? yes
Does your tank have an air stone or other type of aeration? Yes, 2
Is your tank heated? Yes
What tank mates does your betta fish live with? 3(total) bettas, 2 tetras, ghost shrimp
What type of food do you feed your betta fish? Flakes and pellets
How often do you feed your betta fish? Varies between daily, twice daily(morning and evening) and intermittent days for fasting
How often do you perform a water change? At least bi-weekly
What percentage of the water do you change when you perform a water change? 25-50%
What type of additives do you add to the water when you perform a water change? Jungle Aloe Water conditioner (specifically says it helps with stress)
Have you tested your water? If so, what are the following parameters? Not yet
Symptoms and Treatment
How has your betta fish's appearance changed?
How has your betta fish's behavior changed? Has become lethargic, stopped eating within the past day or so
When did you start noticing the symptoms? Symptoms have varied, clamped fins for almost a month
Have you started treating your fish? If so, how? Not yet
Does your fish have any history of being ill? Clamped fins and stress
How old is your fish (approximately)? A few months, I bought her at roughly 1/2in long from Petco as a "baby" betta