Hot Tub Silver Ion Cartridge - For Hot Springs Spa, Spa Ion Ag+ Cartridge, Keep Water Crystal-Clear for 4 Months - 2 Pack
Two grey silver ion mineral sanitizer cartridges for Hot Springs spa hot tubs.
Infographic showing dimensions of a silver ion spa cartridge and instruction manual.
Infographic showing step-by-step installation instructions for a spa mineral sanitizer cartridge into a filter standpipe.
Hands installing a grey hot tub filter stick into a spa filter cartridge.
Two silver ion hot tub mineral sanitizer sticks for cleaner spa water and reduced skin irritation.
Two grey mineral sanitizer sticks for hot tub water purification with natural silver ions.
Before and after comparison of hot tub water clarity, showing improved quality and reduced impurities.
Infographic showing 4-type mineral ball filtration system with magnesium, silver, far infrared, and tourmaline balls.
Hand installing a grey hot tub mineral cartridge into a filter housing with replacement parts shown below.
Two grey silver ion mineral sanitizer cartridges for Hot Springs spa hot tubs.
Infographic showing dimensions of a silver ion spa cartridge and instruction manual.
Infographic showing step-by-step installation instructions for a spa mineral sanitizer cartridge into a filter standpipe.
Hands installing a grey hot tub filter stick into a spa filter cartridge.
Two silver ion hot tub mineral sanitizer sticks for cleaner spa water and reduced skin irritation.
Two grey mineral sanitizer sticks for hot tub water purification with natural silver ions.
Before and after comparison of hot tub water clarity, showing improved quality and reduced impurities.
Infographic showing 4-type mineral ball filtration system with magnesium, silver, far infrared, and tourmaline balls.
Hand installing a grey hot tub mineral cartridge into a filter housing with replacement parts shown below.
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Hot Tub Silver Ion Cartridge - For Hot Springs Spa, Spa Ion Ag+ Cartridge, Keep Water Crystal-Clear for 4 Months - 2 Pack

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Hot Tub Silver Ion Cartridge

Key Features

  • Utilizes silver ion technology to reduce the requirement for high levels of traditional sanitizers.
  • Provides continuous water purification for up to 4 months per cartridge.
  • Designed to inhibit bacterial growth within the spa plumbing and filter system.
  • Helps maintain water clarity and reduces odors.
  • Pack includes 2 individual mineral sanitizing sticks.

Replaces / Cross-Reference Part Numbers

  • 71325
  • 73356
  • FreshWater Ag+ Mineral Sanitizer

Compatibility & Fitment

  • Designed for Hot Spring Spas, including Highlife and Limelight series.
  • Compatible with models utilizing the internal filter compartment or dedicated standpipe for mineral sticks.
  • Can be used with most spas that feature a filter core capable of housing a stick-style mineral cartridge.

When to Replace

  • Replace every 4 months to ensure consistent mineral concentration.
  • Change the cartridge whenever the hot tub water is completely drained and refilled.
  • Inspect during routine filter cleaning; replace if the casing shows signs of physical damage or heavy mineral buildup.

Installation Tips

  • Ensure the spa water is properly balanced (pH and alkalinity) before installation for maximum mineral effectiveness.
  • Remove the old cartridge from the filter standpipe or filter core.
  • Insert the new cartridge fully into the designated filter standpipe.
  • Ensure the cartridge is securely seated to prevent it from floating or becoming lodged in the filter housing.
  • Allow the water to circulate for at least 15 minutes after installation to begin the release of mineral ions.
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COMPATIBLE WITH MOST HOT TUB FILTERS

COMPATIBLE WITH MOST HOT TUB FILTERS

Fits most standard spas with 1-1/4" filter hole and 6.5"-16" length for effortless installation
CHANGE THIS CARTIDGE EVERY 4 MONTHS

CHANGE THIS CARTIDGE EVERY 4 MONTHS

Replace every 2 - 4 months for optimal performance.

FAQ

This cartridge is designed for use in Hot Spring Spas, Tiger River Spas, Limelight Spas, and Solana Spas that utilize the FreshWater Ag+ silver ion system. It is also compatible with most hot tubs that feature an in-filter cartridge housing.
For optimal water quality and continuous sanitization, replace the cartridge every four months. Even if the cartridge appears clean, the silver ions will be depleted, and it will no longer effectively inhibit bacterial growth.
Yes. This silver ion cartridge is a supplement to your sanitization program, not a complete replacement. It works by releasing silver ions to inhibit bacteria, which allows you to use significantly lower levels of chlorine or bromine to maintain crystal-clear water.
Installation is straightforward. Simply remove your spa's filter cap, insert the cartridge into the center of the filter core, and replace the cap. Ensure the cartridge is seated securely so it does not move during the filtration cycle.
Beyond the four-month interval, you may notice that your water becomes cloudy more quickly, or you find it increasingly difficult to maintain your target sanitizer residual despite regular chemical dosing. If you notice these changes, it is time to install a fresh cartridge.
To get the best performance, ensure your spa's pH and alkalinity levels are balanced within the recommended ranges. Additionally, keep your filter cartridges clean, as restricted water flow through the filter can reduce the effectiveness of the silver ion release.