Although I only have access to the abstract, Stamper noted healing of lesions once the carbon use was discontinued. He used coconut shell carbon, which I think is a hard, relatively dust-free carbon. Do you attribute the healing he observed to the type of carbon he used?It depends. The carbon free tank has to have a total history of no carbon use. Many people feel there are also other causes for HLLE. Trouble is, none of those causes have been proven. If at some point, one or more of them are studied, then they would also have to be mitigated. I've tested a few of the alternative ideas - I think I can rule out stray voltage as well as dietary enhancements (as a cure). I'm still not able to rule out heavy metal toxicity and truly deficient diets.
Jay