Made by SPA FROG ®
The SPA FROG ® Mineral Cartridge for In-line and Floating Systems.
In-line System is built right into the spa and uses the same mineral and bromine cartridges as the SPA FROG ® Floating System.
For easy top loading of replacement cartridges, simply open the cap, pull up the holder and snap them in.
Cartridge lasts upto 4 monthsWater Testing
Replace the cartridge when you change the water every 3 to 4 months
SPA FROG® In-Line System is used by many brands including : Marquis Spas, Caldera Spas & Emerald Spas