What size is your tank? 5 Gallon
What temperature is your tank? 78
Does your tank have a filter? Yes, but it needs to be replaced. It's got yuck on it. Replacing it tonight
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
What type of food do you feed your betta fish? Aqueon mini pellets
How often do you feed your betta fish? 4 pellets, morning and night, fast 1 day per week
How often do you perform a water change? Usually 60% once per week, but had to let it go 16 days while on vacation with treated water added as it evaporated
What percentage of the water do you change when you perform a water change? 60% or so
What type of additives do you add to the water when you perform a water change? Conditioner
Have you tested your water? If so, what are the following parameters?
Symptoms and Treatment
How has your betta fish's appearance changed? Other than his tail is kind of stringy/ragged, he seems fine.
How has your betta fish's behavior changed? His bubble nest wasn't very big when we got home and he's possibly a bit less active.
When did you start noticing the symptoms? 2 days ago, when we got home.
Have you started treating your fish? If so, how? No.
Does your fish have any history of being ill? No.
How old is your fish (approximately)? Young? We've had him for a couple of months.
I changed the water the day before we left and as soon as I got home. The pet sitter did not do anything with the water other than to add some as the level drops. I tested the water before I changed it when I got home and not only was it crystal clear, all levels were at 0.
He generally seems fine, but his tail/fins are a little torn up. I have a sponge over the filter intake so it's very unlikely that any damage occurred from that.
Also, he didn't fast while we were gone. He still flares at me, eats aggressively, swims around, and does normal fish stuff.
Any thoughts? Should I be doing anything? It seems totally strange to me that his water was perfect after 2 weeks.