I'm glad you mentioned this about cilantro. One of my friends had severe and permanent damage from cilantro tincture. According to Dr. Mercola, about 1/3 of people are allergic or sensitive to chlorella. I don't consider either to be a safe chelator.
I used NCD zeolite to quickly and safely get rid of a huge body burden of mercury in both my daughter and myself.
Here's a sale site: http://www.zeolite.org/sale.
Not sure how long this will last but for now it's the cheapest place to buy it. My brain fog cleared in less than ten days. It will not irritate the organs or rob the body of minerals like other chelation methods like DMPS do and it's a fraction of the cost of chelation.
Our organs were so compromised that the chelation doc wouldn't treat us for fear of permanent damage. This is nothing to mess around with or take chances with. Many docs don't even test you first! Zeolite, on the other hand is safe enough even for pregnant and nursing mothers to use.