Thank you for your response. It was a close system with a temp control and filters. I totally agree with you. The therapist was really nice, but didn't seem knowledgeable. I did some more research and I have made an appointment with another therapist next week after talking to her for about 15 minutes on the phone with her. She said she could adjust the temp so I woudn't get so much cramps. She also mentioned that the cramps could be due to gas and told me how to reduce this kind of incidence. She also told me a few things to prepare for the next colonic diet wise (which I was never given with the 1st therapist).