As a health care professional I have to disagree with the comment that "salt is like snake oil". It is a well known scientific fact that salt creates an environment where bacteria & fungus struggle to multiply, and will therefore effectively eliminate their capacity to reproduce and cause harmful secondary infections.
Salt baths, gargling, cleansing wounds with saline are all still part of effective wound management in health care today.
I agree that good water quality and a well maitained aquarium is vital in preventing secondary infections as well, but in my opinion and experience salt has been highly beneficial as a piece of the healing process in both humans (25yrs as an RN) and fishes over the past 35 years in the hobby.
Just my 2 pennies worth
