What size is your tank? 20L
What temperature is your tank? Heater set at 26C, does fluctuate. Current temp 28C
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? None
Small pinch of "Nutrafin Max Betta Flakes" 2 times per day, and occasional feeding of Aquarian Betta pellets in place of normal food, as a treat (he loves them, but it doesn't help his colouring like the other one).
How often do you perform a water change? One a week
What percentage of the water do you change when you perform a water change? 25-50% depending on water quality
What type of additives do you add to the water when you perform a water change? Stress Coat, Stress Zyme, Algae Control
Have you tested your water? If so, what are the following parameters?
All within parameters according to the leaflet with my test kit
Symptoms and Treatment
How has your betta fish's appearance changed? Top fin has small hole in it, and tail looks like it shreading. Not got any red or black around it though
How has your betta fish's behavior changed? None.
When did you start noticing the symptoms? Tail - minor shreading apparence a little while ago, but seem to improve. Now a lot worse, noticed today when I really looked at him for the first time all week. Hole - today.
Have you started treating your fish? If so, how? Yes. Added extra stress coat
Does your fish have any history of being ill? No
How old is your fish (approximately)? I reckon about a year old. He was only young when I got him, maybe a 6m.o., had him for 6 months.