The inline chlorinator is for trichlor. Trichlor will add chlorine, CYA, and acid to your pool. If your testing allow for those items, then it can be used. But you must be aware that the CYA will continually increase, thus requiring more chlorine to be added, which adds more CYA, which -- well -- you get the picture.
I assume you are using liquid chlorine. Stay with that. If you leave the pool for a week or whatever then put some trichlor in the chlorinator. Test when you get home and adjust your parameters as necessary.