Something has been wrong with my Betta fish for few weeks now. Up until last week I hadn't noticed anything physically wrong with him. Below is his set up and how I care for him...
-1 Gallon Tank with a Mini Bow Filter
-Nearly a 100% water change once a week
-Water used is tap water run through a Britta and then treated with your usual buffering solution and allowed to sit overnight.
-3 Betta Food pellets daily
-I keep his tank light on all the time (4 watt bulb). The H20 temperature is usually around 85 degrees but the last two days I've kept it around 83 as the staff at PETCO said it was too high so I've been turning the light off at night. He's always done well at that temperature so I'm not sure that's what the root problem is. I don't have a heater in the tank but I'm always cold and keep my apartment at 80 degrees no matter the season which reflects the tank temperature when coupled with his tank light.
-Water tests are normal levels
He's at least a year old. He was a center piece at a wedding I attended last May but I don't know how old they are when the stores acquire them.
He used to make bubbles at the surface of the water but doesn't anymore. He's been listless for awhile but I couldn't see anything physically wrong with him except maybe his fins weren't as lustrous as they were when I first brought him home but that wasn't an overnight deal.
Last week he was looking worse and then one night I saw a "white string" attached between his lower fins with what looked to be a brown dot at the end. This white string wasn't a living thing. Once I had something concrete I could actually search I started looking online. But the deeper I got the more confused I became. There don't seem to be any two websites that agree with each other on courses of action. At first I thought Ich but he doesn't have white dots on him anywhere. I took him into PETCO to the fish section and they said he doesn't appear to have any visible signs of disease other then some slight fin rot.
Online I read about the salt treatment and trying that first as it will usually fix the problem. PETCO said that's what they do first with their fish. So I got the aquarium salt and put the correct amount into new treated water with a temperature of 83 degrees for 48 hours. However, I don't notice a difference in him and he appears to be half reclining on his side at times.
I've attached pictures of him so maybe someone out there that has experience can look at him and suggest what may be wrong. It's making me sick to my stomach knowing he's hurting but not knowing how to help him.
My local PETCO sells all types of medicines but I don't even know what he has and am afraid of doping him up with something he doesn't need thus making his condition worse.
Thank you for your time in reading this. I greatly appreciate any help.