This video (from Cory at Aquarium Co-op; love him, hate him or somewhere in between, it's not the point of this thread), contains a lot of useful and imho good sense info about using salts in aquariums.
More experienced fish keepers will likely know most of the info already but you still might learn a thing or two, and esp. if you're newer to the hobby there's some good info/advice (esp. in the first 30 min. or so, after that he gets into 'super chats' etc.).
And as he points out, it could very well be the case -- with more and more countries banning certain fish meds -- that using salt to treat our fish/tanks becomes even more important/widely used than it already is, so it would be prudent to have some related knowledge:
More experienced fish keepers will likely know most of the info already but you still might learn a thing or two, and esp. if you're newer to the hobby there's some good info/advice (esp. in the first 30 min. or so, after that he gets into 'super chats' etc.).
And as he points out, it could very well be the case -- with more and more countries banning certain fish meds -- that using salt to treat our fish/tanks becomes even more important/widely used than it already is, so it would be prudent to have some related knowledge: