Fish has been in tank more then 3 months. Was quarantine for a week. Checked ammonia, no trace. Not ich, i seen early stages of ich infection before. Tank set a year ago, 75 gal, sand/filter/heater/bubbler same day, like i said 3 months, quarantine for a week, 2 days ago/ sluggish saw near surface, all are starting to "scratch" themselves on sand/ less movement/ all fish/ 2 oscars, 2 marble, 1 ornate and 1 channel, same time giraffe. 2 days ago, 2 days ago.