You should only take peoples advices into consideration. Afterall, most of the things I know I have learned from others or experience. Overall your going to be the one with outcome. However, in my personal experience I have seen a lot of fish with ich. And I have noticed that those fish do much better in fighting itch when you add the recommended dose of salt and med. But overall I agree salt is not always best. But when it comes to itch, it would be a good idea if you did.