Thank you so much for your relpys.
I've started thinking he developed a fungus because the growth on his tail spread a bit since yesterday, however his discoloration went down a bit. I was able to take a few pictures. Also, the specks on the bottom of his temporary tank is food from this morning, he hasn't been eating for the past three days. Except for one tiny pellet yesterday which he accidentally ate when coming up for air.
What size is your tank? Normally a 2.5 gallon tank, but currently I have him in a separate fish bowl with 1 gallon in it
What temperature is your tank? 77-80 degrees f.
Does your tank have a filter? yes, but not in the temporary bowl
Does your tank have an air stone or other type of aeration? the filter aerates the water
Is your tank heated? yes
What tank mates does your betta fish live with? just himself, I had snails a while back but he ate them
What type of food do you feed your betta fish? Wardley brand betta fish pellets
How often do you feed your betta fish? twice daily normally, now only in the morning because he will not eat
How often do you perform a water change? weekly
What percentage of the water do you change when you perform a water change? 100% because of how small the tank is
What type of additives do you add to the water when you perform a water change? water conditioner for bettas, currenty I am also adding API triple sulfa for his fin rot and it is supposed to be for bacteria
Have you tested your water? If so, what are the following parameters?
I have not tested the water
Symptoms and Treatment
How has your betta fish's appearance changed? he appears lethargic and only moves his two little side fins, his scales close to the tail changed color
How has your betta fish's behavior changed? lethargic
When did you start noticing the symptoms? three days ago
Have you started treating your fish? If so, how? yes, I isolated him and used the API triple sulfa
Does your fish have any history of being ill? no
How old is your fish (approximately)? I had him for a year, so approximately a little over a year