Sorry for the bad quality images.
One silver dollar acting erratic. It's bending its body violently left and right
Context - One of my silver dollars got a white patch on it overnight. After a bit of research, I assume d it got hurt by scraping to driftwood. Not fuzzy patch, just plain smooth white patch.
Water changed the day before and everything was fine. Just to make sure no bacterial infection happens, I added a mild dose (70gms) of aquarium salt to approx 45 gallons of water volume today.
The silver dollar with the patch is acting normally and eating well however this one started acting weirdly after an hour after adding the salt mixture. Other fish seems normal.
Need help understanding if the salt caused it? Is it normal? Anyone observed it previously?
All parameters are normal. A, Ni are 0, Na is under 40 ppm. 28c temp