Colon hydrotherapy is a safe and effective method for cleansing the entire colon. It also tones the peristaltic muscles allowing easier, more efficient elimination after your sessions are completed. Colon Hydrotherapy is also called colon irrigation, colonics, colon therapy or high enemas. Regardless of the name, they all refer to the use of water for internal cleansing of the colon (large intestine), without the use of drugs or chemicals.