Can I put the Nature2 Stick inside my vortex spa filters? Holly April 06, 2019 07:09 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 Nature2 Spa Stick? Comments 0 comments Article is closed for comments.