Spa Mineral Sanitizers

Reduce chlorine use and improve water feel with spa mineral sanitizer cartridges from Nature2 and Zodiac. PST Pool Supplies stocks Nature2 spa sticks, mineral cartridges, and professional-grade mineral vessels for portable hot tubs and in-ground spas — starting from $46.80.

Mineral sanitizers use silver and copper ions released from a cartridge to kill bacteria and algae in spa water — supplementing (not replacing) chlorine or bromine sanitation. With a mineral sanitizer, the required chlorine residual drops to 0.5 ppm rather than the typical 3–5 ppm, resulting in softer, less irritating water with reduced chemical odor. The key products in this collection: the Nature2 Spa Stick (Polaris/Zodiac) is a self-contained mineral cartridge that drops directly into the spa's filter housing — no separate vessel or plumbing required. It lasts approximately 4 months and reduces required chlorine by up to 50%. The Nature2 Spa Cartridge W20750 is the replacement mineral cartridge for Nature2 spa vessels — the cartridge contains the silver/copper mineral matrix and is replaced periodically while the vessel remains in-line. The Zodiac Nature2 G Mineral Cartridge and Nature2 2\" Professional In-Ground G Vessel are the commercial-grade mineral sanitizer system for in-ground spas and pools — the vessel installs in-line in the return plumbing and accepts the G-series cartridge. The Dimension One Vision Cartridge (1512-261) is the proprietary mineral cartridge for Dimension One spa systems. The CMP Zinc Anode (0.5 lb, inline) provides sacrificial zinc protection against electrolytic corrosion in spa plumbing and fittings — a separate but complementary water quality component. Nature2 Cense combines non-chlorine oxidizer with spa fragrances — available in multiple scents — for use as a spa shock treatment that also adds aromatherapy.

Mineral sanitizers work best when: spa water chemistry is balanced (pH 7.4–7.6, alkalinity 80–120 ppm), the cartridge is replaced on schedule (every 4 months for most models), and a small chlorine or bromine residual (0.5–1.0 ppm) is maintained alongside the mineral system. Mineral sanitizers alone cannot achieve adequate sanitation — they require a co-sanitizer. Never use mineral sanitizers in spas with biguanide (Baquacil/SoftSoak) water care systems; mineral ions are incompatible with biguanide chemistry.

Shop spa mineral sanitizers at PST Pool Supplies and enjoy spa water that's gentler on skin and eyes without sacrificing sanitation.