You can schedule appointments on line via Google Calendar. You will need to create a Google account if you do not already have one.

To Create a Google account open you browser to http://www.google.com/calendar

You can then access Colorado's Best Colonics schedule from this location
https://www.google.com/calendar/selfsched?sstoken=UUhhVlp3d0RCdDU3fGRlZmF1bHR8N2M0MGIzMzFjMTRkZGQxMjUwZjZiOGZhNGFhMWVhZDg

Online Calendar