Chelation was absolutely necessary for me to get rid of candida, meaning real chelation with DMSA/DMPS/ALA, etc. I wasted a year trying an anti-candida approach before I finally realized that metals were at the root of my problems.
If you are metal toxic, bentonite, chlorella, and other 'light' chelators alone won't do cut it. You need real chelators as recommended by Andy Cutler.