I guess it depends on personal preference... I rinsed, rinsed, rinsed, and rinsed again my Flourite. Then I let it soak for about 4 days, and rinsed it again. If you don't rinse it, then let it all settle, EVERY time you go to move a plant or do anything, it will stir up a monumental amount of dust which bothers me. Even with all my rinsing there was still a day of waiting for the dust to settle, but I can move things around without stirring it up too much.