Colenz Colonic Machine: Revolutionizing Colon Hydrotherapy A Brief History of the Colenz Colonic Machine The Colenz Colonic Machine was invented by Dr. Robert F. Gray in 1976. Dr. Gray pioneered the use of high-volume water irrigation in colon hydrotherapy, which led to the development of the Colenz Colonic Machine. Since then, the machine has undergone numerous upgrades and improvements to …