I agree that heavy metals cause candida to overgrow and until metals are dealt with its hard to resolve†candida. You have to improve the health of the whole body by balancing minerals as well as addressing the candida directly in the gut with diet, anti fungals and biofilm treatment.
I had a chronic yeast infections for 2 years and tried everything but it always came back, I was on the candida diet for years.† After detoxing metals for a while and improving the terrain of my body- candida and parasites died off on their own because my body became an unhospitable host for them. Candida antibody testing showed that i no longer had candida anymore and I can now eat as much fruit or even Sugar (not that I do!) as I want and candida does not return because my body is healthier and able to keep it under control.
Chelation is one way but I used hair tissue mineral analysis by ARL labs to balance my mineral levels and ratios and detox my body.