I think my betta is dying. Need more opinions.

I’ve had my Betta fish for about 4 months. I had him in a community tank, but recently moved him to his own tank due to bullying. He also had Popeye, which he just got over. But recently he has been laying around all day, kind of breathing heavily, and laying on his side . He seems old to me, I know they’re more susceptible to disease when they are older, that could’ve been why he got his Popeye. One of his eyes are foggy, he has a little bit of a hunchback, and his fins are just more ragged then they were when I got him. He eats, but sometimes spits it out or has trouble finding it. I think he’s dying, but want another opinion.

 

Do you know how old he is? And if you could fill out the emergency template that would help.

 

Do you know how old he is? And if you could fill out the emergency template that would help.

I don’t.
What is the water volume of the tank?
16 gallons
How long has the tank been running? I’ve had it for a month but I bought it from someone who had it for a year.
Does it have a filter?
Yes
Does it have a heater?
Yes
What is the water temperature?
80°
What is the entire stocking of this tank? (Please list all fish and inverts.)
My betta, bristle nose Pleco, a couple snails

Maintenance
How often do you change the water?
Once a week
How much of the water do you change?
1/4 of it
What do you use to treat your water?
TankFirst water conditioner
Do you vacuum the substrate or just the water?
I vacuum the substrate

*Parameters - Very Important
Did you cycle your tank before adding fish
Yes
What do you use to test the water?
API test kit
What are your parameters? We need to know the exact numbers, not just “fine” or “safe”.
Ammonia: 0
Nitrite:0
Nitrate:
pH:

Feeding
How often do you feed your fish?
Once a day
How much do you feed your fish?
A little bit
What brand of food do you feed your fish?
Hikari pellets and Tetra Bettamin flakes
Do you feed frozen?
Yes brine shrimp and daphnia

Do you feed freeze-dried foods?
Sometimes freeze dried Bloodworms

Illness & Symptoms
How long have you had this fish?
4 months
How long ago did you first notice these symptoms?
A week ago
In a few words, can you explain the symptoms?
Lethargic, not that hungry, foggy eyes
Have you started any treatment for the illness?
No
Was your fish physically ill or injured upon purchase?
No
How has its behavior and appearance changed, if at all?
Not as active, fins are more ragged.

 

I sadly had to euthanize him due to dropsy.

 

I'm sorry for your loss

 

I'm sorry for your loss

Thank you, I appreciate it.

 

So sorry for your loss, dropsy is a horrible disease