I need help with my dying fish... swim bladder?

Crono

Black Skirt Tetra
MFK Member
Jun 15, 2022
49
10
13
Have you tested your water?
No
If I did not test my water...
...I recognize that I will likely be asked to do a test, and that water tests are critical for solving freshwater health problems.
Do you do water changes?
Yes
What percentage of water do you change?
51-60%
How frequently do you change your water?
Every two weeks
If I do not change my water...
...I recognize that I will likely be recommended to do a water change, and water changes are critical for preventing future freshwater health problems.
how it started,
I put it in a quarantine tank because of popeyes. as eye 'healed', move it back to the main tank.
few hours after move back to main tank, spot it swim erratically, darting around the tank while body... not swimming straight horizontal.
search similiar symptom, possibility cause: poor water, parasite, or swim bladder

I do water change before move it back to the main tank, as the main tank & quarantine tank have the same water.
the other fishs are alright in the main tank.

parasite... can't tell.
swim erratically support the swim bladder symptom

if swim bladder, I scroll around the forum.
  • lower water level, decrease stress create.
  • antibiotic (epsom salt or similiar to that)/salt bath
  • water change (was it everyday, or 3 day?)
  • pure green pea without 'additional ingridient'
Any other I miss?
anyway, I have done give the quarantine tank the medicine, yet can't help worrying as it is still in floating position.
can't post vid here

can't help?

ps. has anyone tried this method?
 
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