Don't try chelating under any circumstances unless you have your mercury filings safely removed and replaced. The only proven safe method to chelate mercury is the Cultler Protocol. There is a Cultler Protocol form on Curezone and lots of Cultler Protocol information on the Internet. Here is one place you can start your research: http://home.earthlink.net/~moriam/ANDY_INDEX.html
Please don't use cilantro. Cilantro mobilizes mercury but doesn't do much to eliminate it from your body. It is also difficult if not impossible to determine how much mercury you are mobilizing when you eat cilantro.