Thank you for the help. I took the scraping today and according to the book I have (Diseases in Marine Aquarium Fish by Bassleer) the spots match the example of Cryptocaryon in the book. My microscope's camera will not focus on such a large specimen only partial. I am no expert though, far from it. There are probably many parasites on Marine fish that look alike to lay persons.
Spots appeared July 14. Started hypo at 1.009. The spots did not change, go away, nor do they move.
Lowered hypo to 1.008 in case my refractometer was off.
On July 17 I put him through 5 days of Maracyn 2. It was recommended to stop the treatment.
Should I retry the Maracyn 2 again? or maybe another antibiotic?
I just bought new PH meter, will calibrate and retest. Chem tests fine, no am, NO2, NO3 less than 10. This QT has been up for many months with frequent water changes. Its only 20 gal.
Also, there are spots on his tail and a couple on his fins that do not show in the pic. The spots do not seem to increase or change.
help!!!