I'm new and have a question...or two

[MikeP]

Just starting a 30gal FOWLR, don't have fish yet and I still need a bit more rock but it's coming together. My questions are, I also have a fresh water 55gal tank do I need to keep things like nets, scrapers and my water change hoses separate? If I use one for the salt water can I then go ahead and use it in the fresh tank? Will the salt harm my other fish? I have used aquarium salt before but I think I remember something about it being different from marine salt. Also being new at this soes anyone have any advice to give other than research, research, research (which I am in the process of doing).

Thanks