if i may add my 2 cents on this.....
It has been found that Ich does not infect new fish at 29.4°C/85°F (Johnson, 1976), stops reproducing at 30°C/86°F (Dr. Nick St. Erne, DVM, pers. comm.), and dies at 32°C/89.5°F (Meyer, 1984)
so surely if you increase the tank temp to 32 degrees and hold it there for 14 days it will cure it naturally??
It has been found that Ich does not infect new fish at 29.4°C/85°F (Johnson, 1976), stops reproducing at 30°C/86°F (Dr. Nick St. Erne, DVM, pers. comm.), and dies at 32°C/89.5°F (Meyer, 1984)
so surely if you increase the tank temp to 32 degrees and hold it there for 14 days it will cure it naturally??