Can I put the Nature2 Stick inside my vortex spa filters? Holly June 12, 2018 22:21 Updated Follow No, we do not recommend putting the Nature2 stick inside your vortex filters, as the hole is to large and the stick can fall down into the pipe work. You can place the Nature2 stick inside the skimmer box and it will float above the filters. Related articles What is a Purezone Filter ? Can I use the Nature2 Spa Stick with bromine sanitiser? Comments 0 comments Article is closed for comments.