Each colonic lasts 30 minutes, which actually doesn't add up. They cost $25 each, but that's because I got a good deal through Groupon. They are normally $70-$150 each. I don't have that kind of dough, so it's gravity and enemas for me from now on!
In the US they are required to be certified. There are special schools and several schools in my area. I have seen the certification of the colon hydrotherapist I have been seeing. I just can't believe how much it costs! Crazy!!!
Good luck with the new regime. I will check out the regulation requirement here in case I am wrong.