Yep its this thing here:
What size is your tank? 4L
What temperature is your tank? 68 to 77 (I know its low, sometimes drops to 64)
Does your tank have a filter? not yet
Does your tank have an air stone or other type of aeration? nope
Is your tank heated? no :C
What tank mates does your betta fish live with? none :C
What type of food do you feed your betta fish? Mini Granules
How often do you feed your betta fish? once a day, sometimes I give it like 1-2 bloodworms, he doesnt like it much :C
How often do you perform a water change? daily atm
What percentage of the water do you change when you perform a water change? 100%
What type of additives do you add to the water when you perform a water change? Tap water conditioner (although I use mineral because of tap water problems)
Have you tested your water? If so, what are the following parameters? nope
Ammonia: dont have
Symptoms and Treatment
How has your betta fish's appearance changed? Yeah, since last week it was full of this gooey stuff, then I looked for help and I started changing the water daily and tried to keep the water heat more or less stable while I wait for my aquarium.
How has your betta fish's behavior changed? Yes, he is alot calmer now since I started the "treatment"
When did you start noticing the symptoms? Since I got it back from holiday and got it from my friend's house (he was kept there for 2 weeks)
Have you started treating your fish? If so, how? Just daily water change, his gooey stuff went down 95%, but he's still getting it and releasing in the water.
Does your fish have any history of being ill? None that I know of, I have him for 2 months (?) I got it from a friend who was moving away.
How old is your fish (approximately)? No idea but probably older than 6 months.
My old thread is here if you want to read: