What size is your tank? 2 gal
What temperature is your tank? 80-82 F
Does your tank have a filter? no
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? New Life Spectrum Betta Formula
How often do you feed your betta fish? about 5 pellets twice a day
How often do you perform a water change? was trying for 50% daily. but was more like 100% every 2 or 3 days...
What percentage of the water do you change when you perform a water change? see above answer
What type of additives do you add to the water when you perform a water change? 1ml stress coat+ and 1tsp aquarium salt per gallon
Have you tested your water? If so, what are the following parameters?
Nitrite: 0.25 (I'm super confused about this one )
Symptoms and Treatment
How has your betta fish's appearance changed? Clamped. Colors look darker if anything. The red of his fins is very dull
How has your betta fish's behavior changed? Clamped up and wedged atop the thermometer so he was right by the water surface. When he swam away from that perch he would end up completely vertical, nose to the surface, as if he can't keep his tail afloat. He also will occasionally twitch a couple of times. It seems to only happen if he moves.
When did you start noticing the symptoms? This morning after he was fed
Have you started treating your fish? If so, how? Did a 100% water change and only filled the tank up half way with conditioned water. I left the aquarium salt out.
Does your fish have any history of being ill? He had fin rot when I purchased him (~3 weeks ago) and is still being treated for it.
How old is your fish (approximately)? I got him the day before Father's Day and he's maybe 1.25" long (not including fins)
I did add a new heater to his tank yesterday because I needed the one he had for a different tank. When I fed him this morning he seemed fine. Then, maybe 30 mins later, he was floating on one of his plants near the surface and didn't react to me. I wasn't terribly concerned until I got home from class a couple hours later and he was still clamped and floating at the surface, surrounded by sick bubbles :(
I did a 100% water change and rinsed all the stuff from his tank as well as I can (heater, plants, thermometer, tank). I only added the heater and one small plant back into the tank after the water change. I'm currently still acclimating him to the clean water. Hopefully that will help some.
Since I brought him home he has never clamped up like this. He'll get stress striped if I cup him for a 100% water change (which is why I tried doing ~50% instead), but even then he almost never closed up his tail. It was always at full spread no matter what. He also almost never stopped moving. So the fact that he's all clamped up and lethargic now makes me super worried.
Any input as to what might be going on and what else I could possibly do will be extremely appreciated! Thanks so much!