Do you know why your stool turned green? Was it dark green flecks in the stool? The reason I ask is because that's what happened to me after doing a few days of yeast killing the first time. After that, I felt a lot better. I believe I was looking at dead yeast being expelled.
The other time I saw green flecks was while taking Chlorella. That was obviously Chlorella being expelled.
I think anything which helps you feel better in general or helps your cleansing systems work better will make it easier to chelate.