I like http://www.clearwayhealth.com
because it's clean and the staff is very knowledgable about colonics, enemas and colon cleansing. Their support herbs have no fillers and are made from nature not synthetic, especially for candida support.
I took a look at their web link and it looks to me like they have a very nice setup and one that would definitely be worth checking out if you are considering colon hydrotherapy.