Badbird

Newbie tub owner here. I purchased a used Artesian Antigua, 6 years old. The previous owner had been using the Nature2 system so I decided after researching it that I would commit to giving it a spin. I made a visit to my local spa dealer (In fact the dealer that the tub was purchased from in the first place) to get help and advice to get off to a good start running the tub. They tested the water and gave me instructions on what to add to balance it. Then they set me up with a chemical regime. This is where I'm confused. The Nature2 system, as per insrtuctions, is MPS shock before/after each use and chlorine once a week(or as needed). However the spa dealer recommended the opposite. Chlorine before and after using the tub and use the MPS once a week. I have no reason to doubt the knowledge of this dealer, they are a very reputable place, I just want to verify if this is a legitimate way to run Nature2 or not.