Here's the deal... I got my male betta Cortez in... April, I think? May? Sometime around then. At that point, I didn't realize that the university I would be attending in the fall doesn't allow fish to be kept in dorms... *facepalm*. When I figured this out I tried to rehome him, but nobody wanted the poor bugger. So my mom said she would feed him and turn his light on and off, but wouldn't do water changes. I thought I'd be coming home more often since my school is only an hour away, but I've been caught up...
I came home after two weeks and he was completely fine. The filter was a bit clogged with algae, so I fixed that and did a 100% water change.
Now I came home three weeks later and the poor thing is nearly dead. My mom claims it happened suddenly over the last two days, but his tail is nearly gone. :/ He's also very bloated and sits on the bottom. He usually hides in his castle... The filter was not working. I had instructed my mother maybe two weeks ago to check if the filter was clogged (like it was the first time) and she said it was, so I got her to fix it but the thing must have become detached from the tank wall when she did that because it was sitting on the bottom. Still technically running, but it wouldn't have be able to suck up anything.
I did a 100% water change, cleaned all of his gravel, plants, etc., fixed the filter, and added a bit over a teaspoon of aquarium salt. I'll do this everyday until I leave, but I'm leaving Tuesday morning and my mom won't continue doing this for me... blah. I've also stopped feeding him, since he's very bloated.
I don't know if I should bother continuing treatment, since I can't see him getting any better in a few days. I'm starting to wonder if I should just end his suffering now... I don't know how to euthanize a fish though. Thoughts? I can provide pictures tomorrow if needed.
What size is your tank? 1.5 gal
What temperature is your tank? 78 F
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
What type of food do you feed your betta fish? Nutrifin max pellets/ bettamin flakes.
How often do you feed your betta fish? Twice daily.
How often do you perform a water change? I used to change twice a week, but so far only twice this month. :/
What percentage of the water do you change when you perform a water change? When I did it twice a week, 50%. Now 100%.
What type of additives do you add to the water when you perform a water change? Aquaplus.
Have you tested your water? If so, what are the following parameters?
Ammonia: Was at 0.5 before water change. Now 0.
Symptoms and Treatment
How has your betta fish's appearance changed? Tail is very nearly gone. It's just a thin line. He is also very bloated.
How has your betta fish's behavior changed? Hides in his castle, and struggles to swim to the top (when he does, he rushes up for air then sinks back down).
When did you start noticing the symptoms? Today... my mom said she noticed them two days ago.
Have you started treating your fish? If so, how? 100% water change, gravel & decor cleaning, aquarium salt, and fasting.
Does your fish have any history of being ill? He has had finrot before, when I got him (which escalated a bit but was eventually cured).
How old is your fish (approximately)? I got him six months ago from a pet store.