kokanee001
     Tony and Spatechs advise in bang on, relax and don't let little changes in your water stress you out
I'll give you a little advise the was given to me when we first got our tub.  I can't take credit for this as it was someone from this board that passed it on to me.  Get yourself into a system during the week, mine is
                        Thursday       Shock tub with MPS
                        Saturday       Rinse out filter cartridge
                        Sunday        Test water and make any corrections
                        Add one teaspoon of dichlor for each bather after each use
                        Change water after the first 30 days and every 3 months thereafter
That's it in a nutshell.................I'm sure other issues may come up but follow a schedule and you should be able to relax and enjoy 
