I use a lot of Raw fresh seaweed and always rinse it and toss it and rinse it and dry it before it goes on the heap or gets used as a thick top dressing.
Is there a way to tell if I am removing enough salt and how much sodium is in the plant and how much is just on it? They use a ton of roadsalt here and I get salt mist blowing off the water all the time so can the plants become accustomed to it. I can't "notice" any ill effects to seaweed but there must be a point where to much of a good thing is not..