How do I use a Nature 2 Stick? May 25, 2018 00:23 Updated Follow Depending on your swim spa but recommendation is 1 x Nature2 Stick for up to 2000L spa volume. For more details on Nature2 Spa Stick, click here. Related articles How do I remove the white flakes from my water? Do I need a transformer if I have a lot of lights in my spa? Can I use spa shock with my purezone filter? Why is there yellow liquid coming out of the Ozonator? What is a Purezone filter? Comments 0 comments Article is closed for comments.