Hi this is my area of knowledge. I have done it all from coffee enemas, herbal teas, the epsom salt cleanse, etc...
If you are getting colonics done it has to be the gravity method.
www.karensraw.com
Click on her beauty/spa services
www.bcnaturalmedicine.com
This is a full service center for anything holistic and Ana is very good.
This is not a one time thing--you need to have it done on a schedule until you have flushed all of the tar, candida and waste out that has been stuck to your intestinal walls for all of these years. The more often you go back and follow a trained practitioner's advice--do it and then remain on a maintenance schedule. It can help immensely. There are other teas, tinctures and things you can buy from a supplement website or store to help.
You also need to incorporate pH drops for alkalizing your water and a lot of fresh organic fruits and veggies.
If you would like more info I can send you some very simple documents to help aid your healing. ____@____.com
T.
Detox Coach