How colon hydrotherapy works. Warm filtered water is introduced into your colon through a small tube called a speculum that is gently inserted less than two inches into your rectum. As the warm water enters, you’ll feel a fullness as your colon fills up, then a relaxing feeling as it empties. The water pressure and temperature are precisely controlled and all waste is drained away discreetly in a closed system.The filling and emptying procedure is repeated several times. Unlike an enema, colonic hydrotherapy reaches the whole length of your large intestine. Lidia’s addition of massage, sound healing, LED light and other healing modalities ensure that you reap the most benefits possible. This procedure is always done with Lidia’s utmost discretion, dignity and respect.