Spa Accessory Spa Frog The SPA FROG® Mineral Cartridge for In-line and Floating System. In-line System is built right into the spa and uses the same mineral and bromine cartridges as the ... Material Safety Data Sheet - Hydropool Product Name: SPA FROG® Bromine Cartridge Revision Date: March 1, 2012 Revision: 4 Supersedes: Rev 3, 03/01/09 Page 2 of 6 Material Safety Data Sheet Spa Frog In-Line System - Operating Instructions 1. Run filtration system as directed by your spa manufacturer to maintain proper water flow through the SPA FROG In-Line System. 2. Regularly test water for pH, total ...    Read More