Let me preface this by saying: I have to admit that although I did some research before getting my fish, the pet store let me walk out the door with an inadequate setup.
Since then I've been reading the forum, learning more, and doing my best to improve my boy's life. If I'm doing something horrible, I assure you I'm more than willing to fix it!
So... I've had him for about four weeks.
Two weeks ago I noticed he had bitten his tail a little, but he otherwise seemed healthy. His tank doesn't have a filter, so I thought maybe an airstone would help.
About one week ago I got a tiny airstone, and I have it on the absolute lowest setting, so as not to disturb him.
But in the past few days since setting it up, he has started completely destroying his tail! I've read a lot of different info about this so I'm not sure what's driving him to do it.
I'd like to know what the likely cause is, and how to help him heal.
What size is your tank? Between 1-2 gal (I'm in the process of finding a larger one)
What temperature is your tank? Upper 70s
Does your tank have a filter? No
Does your tank have an air stone or other type of aeration? Small airstone
Is your tank heated? Yes
What tank mates does your betta fish live with? None
What type of food do you feed your betta fish? Flakes
How often do you feed your betta fish? About every other day. (I've read a lot of conflicting information about how often to feed him. Could this be the problem?)
I've changed his water about once a week since getting him. Most recently I changed around 50%
Symptoms and Treatment
How has your betta fish's appearance changed? Tail is chewed up!
How has your betta fish's behavior changed? I haven't noticed a behaviour change. Then again, I'm still a newb and might not notice subtle changes.
When did you start noticing the symptoms? It started getting bad in the past 2-3 days.
Have you started treating your fish? If so, how? I don't know how. :(
Does your fish have any history of being ill? N/A
How old is your fish (approximately)? Not sure. I've had him about four weeks.