I like to use salt for my fish if they have a wound or an ich outbreak. I use plain rock salt(since it's cheap!) and had a question about measuring it. Usually I measure it before I grind it up into powder(much easier to mix into the water) but I was wondering if I should measure it after I grind it up. If I do that then I would be using more salt. How do you guys measure your salt? Do you grind it up before mixing it with the water? Also, can I use the salt that is made for salt water aquariums? Thanks!