Bro, salt can be a remedy but be careful using it. I would normally avoid using it if unnecessary.
It may had been caused by poor water conditions, sudden in pH change, or sudden...and I'm talking about extreme temp changes.
Raise water temperature to 34°C
gradually. Yes...in this case add 1% coarse salt to the water. Increase ur air supply. Change water roughly 25% every 2 days. Ohh...another thing, try adding ketapang leaves or blackwater to soften the water if possible. Dun feed it for the time-being. Juz be patience and keep on repeating till it recover. Good luck with it
