You'll be fine. If I'm going to use one of the tubs on the floor I make sure the chlorine is up to about 10 ppm before I get in, that way I don't have to shock it again when I'm ready to leave.
As to the commercial end of things, didn't read all the comments, but code dictates that the pH in pools and hot tubs commercially be checked every two hours.
Chlorine not to exceed 8 ppm, not to dip below 1 ppm- combined chlorine no more than .5 ppm.