i still believe meds+heat+salt is the best and fine(for most fish). most meds seem to work better and this is reflected in the books i have read. the meds kill the pathogen (frequently only at one stage of its life cycle) and the heat allows them to go through their life cycle faster so the meds can kick in faster. i have never observed problems as have been discussed concerning higher toxicity of meds at high temps in some fish. i am sure many fish can handle the longer time being infected by a pathogen by not using heat, but many cant. even a hardy species may have a more sensitive individual (hence why he may be the one that is sick in the first place) and therefore needs to be treated as fast as possible to get it out of the effects of the pathogen, and move on to general recovery. everything ELSE i have read pretty much says the opposite of what that one article said, so i am not going to change my ways i have developed using books and experience, based on one or two articles from the internet.