The problem with the likes of 'natural' chelation therapies is that you can't manage doses properly. I would stay clear of chlorella - too many bad stories with it.

You can use ALA to chelate on. I would also recommend sauna to get a good sweat going 3 times a week. I see no reason why you can't use DMSA alongside it. According to Cutler - using DMSA alongside ALA will improve your recovery time by 30-40%.

I'm using ALA and DMSA.