Is it suitable to use only one Nature2 Stick for a swim spa? October 24, 2017 02:43 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 Is it ok to have the Nature2 Stick laying horizontally? Can I use Bromine tablets & floating dispensers in my spa? Where can I buy an Automatic Chemical Dosing Unit? Why do I have white flakes in my spa? 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.