its more of an old school way.and MOST of our fish we get from
LFS now a days, have never seen salt....it makes them overproduce slime coat which in turn, can stress them out big time from the overproduction..there now is much more natural more fish friendly ways to do this....most of your water conditioners have that ability now and salt isnt needed..but each person believes in different ways...I can say angels, tetras, and your cories, will not like it ...so a few water changes with some stress coat+ will get rid of the salt and help their slime coat more naturally......