I just got ready to make a batch of sauerkraut in my Harsch Earthenware Fermentation Crock and to my shock and dismay, the bottom of the crock had black mold in it, as did the weight stones. I washed the crock in vinegar and feel ok about using it. However, I am not comfortable using the stones. I boiled them in water with baking powder, but I am still concerned about mold that might be ingrained in the crevices of the stone. I don't know if the boiling process will kill all of the mold. Does anyone know if i can use the stones under these circumstances? If not, does anyone know who sells the stones by themselves? I am so bummed out!