Spa Frog Serene Mineral Sanitizers are the only mineral systems for spas that work with low levels of bromine for the highest water quality.
Mineral and bromine spa care.

• Cartridges work in the frog floating and in-line systems.
• Cuts bromine use up to 50%.
• Cuts maintenance time.
• Water feels softer with a crystal clear shine.
• Using less bromine helps reduce odors.
• Mineral cartridges last for a full 4 months before needing to be replaced.
• Bromine cartridges last for between 4-6 weeks and take just seconds to replace. (Bromine usage varies depending on spa size and number of spa users.)