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Could be. Although I’d expect to see more damage. I guess not always.Maybe a heater burn?
Also I clean the filter regularly. Not just cleaning media but vacuuming out the filter.Occasionally my oscars get some white specks (not ich-larger specks or patches/marks) on their pects. My routine for anything that is concerning but not necessarily full blown disease:
1. Large water changes. Twice a week.
2. Add some salt
3. Add some StressGuard
4. Keep temp below 80.
5. Monitor
In fact, I do the above anyway as usual practice. Except the salt and stressguard. Diet is also extremely important. Nutrients, minerals and vitamins a must.
Would that usually occur due to fighting with other fish or running into things?Could be from broken fins. Would watch at this time.