Hi, I got a male deltatail betta about a week ago from a less-than-stellar Petco. I assumed the black on his fins is rot from being in the cup and that clean water would take care of it, but it's been a week and it hasn't changed, despite the fish perking up considerably. He's shy but explores his tank, greets for food (altho he mostly spits it out), doesn't clamp his fins, etc.
Is this part of his natural color, or should I move him to a hospital tank (due to live plants) to treat for rot? Wait it out? He's very difficult to catch and I'd be worried about stressing him. Thank you so much for your time :)
What size is your tank?: 6g.
What temperature is your tank? 76 degrees F
Does your tank have a filter? Yes (cycled).
Does your tank have an air stone or other type of aeration? Very small airstone in a corner.
Is your tank heated? Yes (76 degrees F).
What tank mates does your betta fish live with? None, but possibly a few tiny pest snails.
What type of food do you feed your betta fish? Hikari biogold.
How often do you feed your betta fish? Once a day.
How often do you perform a water change? Approx 2x a week.
What percentage of the water do you change when you perform a water change? 20-25%.
What type of additives do you add to the water when you perform a water change? Dechlorinator, low/nonmedical dose of aquarium salt (half a tablespoon for 6 gallons).
Have you tested your water? If so, what are the following parameters?
Symptoms and Treatment
How has your betta fish's appearance changed? n/a (new)
How has your betta fish's behavior changed? Improved since being in the Petco cup... he's "perkier" and explores the tank, but still spends most of his time hiding. Will greet for food but spits it out.
When did you start noticing the symptoms? Since buying him a week ago.
Have you started treating your fish? If so, how? No.
Does your fish have any history of being ill? n/a
How old is your fish (approximately)? Don't know.