What is Colon Hydrotherapy? Colon hydrotherapy is the gentle rinsing of the colon with filtered and temperature regulated water, to soften and remove encrusted fecal matter, gas and mucus. This allows vital nutrients to be absorbed more easily and leaves you feeling rejuvenated and healthier. Our colon hydrotherapy unit is a gravity-flow design, meaning that there is no pressure forcing water into your colon. Water flows in and waste flows out at a rate determined by your own