I think getting fillings removed and low dose chelation could make a big difference, like what sunshine has experienced.

Taking higher doses of chelating agents doesn't move that much more mercury. I forget the exact number, but for example, taking 50mg of DMSA as opposed to 25mg would only chelated mabye 1.5x more mercury, not 2x more even though the dose was doubled. It involves the square root of the dosage you take.