What's the deal with doing salt all the time? Just because your fish never get sick doesn't mean it's because of the salt.. My fish never get sick- and I don't use salt. Now, in the event of them getting a bump, scratch, illness- I only ever use salt- unless the salt won't help.
What people don't realize that by constantly using salt, you are creating salt resistant strains of bugs- so that is/when your fish get sick, you won't be able to use salt to clear it up. Not to mention that by constantly leaving your fish in a salted tank, you are slowly dehydrating your fish. Your fish has a freshwater osmosis system.. when you place your fish in salted water, what you don't know is that your fish has a lower salt concentration than the surrounding water. The water in the fish moves through the cells of the gills on the fish from the area of low salt concentration, to the area of high concentration- the result: dehydration.