does anyone know how to remove a slow release fertilizer from the soil? It is in a crystal like form...visably all through the soil. It's a very very very low amount of fert like .06-.03-.03 but I don't know how to flush it so that it does not make my smoke toxic when I go to harvest it. Do I even need to get rid of it? I'm into about the 3rd week of flowering and I'm positive that it will not be gone when I need to harvest. Any thoughts??