Keep in mind that when you chelate(more so with ALA than DMSA) mercury is excreted through the intestines. There may be some mercury that is reabsorbed from the intestines. Algin and other fibers might help get rid of some residual mercury and some candida from the intestines. I do wonder though about some algin and other seaweeds containg arsenic and other toxic heavy metals. Some websites advise people to do a colonic after each chelation round to help get rid of mercury that is in the large intestine, some of which might be absorbed. I think this is a bit radical, however some might feel it is reasonable.