How often do I need to sanitise? September 05, 2017 04:44 Updated Follow Refer to Chemical Quick Start Up Guide. SpaStore Chemical Quick Start Up Guide_210617AU.pdf 400 KB Download Related articles How long do filters last? If I have UV and Ozone systems, do I still need to use the same amount of sanitiser? How do I switch from a chlorine to a chlorine free spa sanitiser? Can a spa be run without chemicals? How do I get the remaining 10 cm of water out of the spa after I have drained it? Comments 0 comments Article is closed for comments.