Salt water hot tubs have become increasingly popular, and many Master Spas owners ask whether salt systems are right for their spa. There’s also confusion around salt-compatible vs salt-generated systems, maintenance requirements, and long-term effects on spa components. This guide breaks it all down so you can make an informed decision for your Master Spa hot tub.
Do Master Spas Use Salt Water?
Master Spas hot tubs do not come standard with a salt water system. However, many Master Spas models are salt-system compatible, meaning an aftermarket salt chlorine generator can be installed if the system is designed specifically for hot tubs.
It’s important to understand that a salt hot tub is not chlorine-free. Salt systems still create chlorine—just in a different way. Get the Master Clear Salt System Start Up Kit here (salt system not included).
How Salt Systems Work in Hot Tubs
A salt system works by dissolving salt (sodium chloride) into the spa water. The system then uses electrolysis to convert the salt into chlorine. That chlorine sanitizes the water and then reverts back into salt, creating a continuous cycle.
In a Master Spa hot tub, a salt system:
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Produces chlorine automatically
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Maintains more consistent sanitizer levels
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Reduces the need for manual chlorine dosing
Benefits of Using a Salt System in a Master Spa
Many spa owners choose salt systems for comfort and convenience. Key benefits include:
1. Softer, Silkier Water
Salt water often feels smoother on the skin and can be less drying than traditionally chlorinated water.
2. Reduced Chlorine Handling
Because chlorine is generated automatically, you handle fewer chemicals and spend less time adding sanitizer manually.
3. More Consistent Water Quality
Salt systems help maintain steady chlorine levels, which can lead to clearer, more stable water when properly balanced.
4. Less Chlorine Odor
Many users notice reduced chemical smell compared to manual chlorine dosing.
Potential Downsides of Salt Systems in Hot Tubs
While salt systems have advantages, they are not maintenance-free and may not be ideal for every Master Spa owner.
1. Corrosion Risk
Salt is corrosive. Over time, improper salt levels or poor water balance can damage:
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Heaters
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Pumps
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Metal fittings
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Sensors
Master Spas are built with quality components, but salt systems require strict water chemistry control to avoid long-term damage.
2. Higher Upfront Cost
Salt systems cost more initially than traditional sanitizer setups and may require replacement cells every few years.
3. Still Requires Water Testing
Salt systems reduce workload but do not eliminate it. You still need to:
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Test water regularly
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Balance pH, alkalinity, and calcium hardness
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Shock the spa as needed
4. Warranty Considerations
Not all salt systems are approved by every manufacturer. Using an incompatible or improperly installed system may affect warranty coverage. Always verify compatibility before installation.
Salt vs Traditional Chlorine in Master Spas
| Feature | Salt System | Traditional Chlorine |
|---|---|---|
| Sanitizer Type | Chlorine (generated) | Chlorine (manual) |
| Water Feel | Softer | Standard |
| Maintenance | Moderate | Moderate |
| Upfront Cost | Higher | Lower |
| Long-Term Cost | Moderate–High | Low–Moderate |
Both methods can maintain excellent water quality when done correctly.
Are Salt Systems Safe for Master Spas?
Yes—when properly installed and maintained. The key factors are:
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Using a spa-specific salt system (not a pool system)
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Maintaining correct salt concentration
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Keeping balanced water chemistry
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Following manufacturer recommendations
Improper salt levels or neglected water balance are the most common causes of equipment issues. Get 10 lbs. of Master Clear Salt Plus here
Do You Still Need Chemicals With a Salt System?
Yes. Even with a salt system, you will still need:
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Shock (chlorine or non-chlorine)
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pH increaser/decreaser
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Alkalinity adjusters
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Calcium hardness control
Salt systems simplify sanitation—but they do not replace overall water care.
Is a Salt System Right for Your Master Spa?
A salt system may be a good choice if you:
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Want softer-feeling water
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Prefer automated chlorine generation
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Are comfortable monitoring water chemistry closely
A traditional chlorine system may be better if you:
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Want lower upfront costs
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Prefer simple, proven maintenance routines
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Use your spa occasionally rather than daily
Expert Advice from Master Spa Professionals
At Master Spas Parts Online, we work with Master Spa owners every day. Salt systems can be a great option, but only when matched correctly to the spa and maintained properly.
If you’re considering a salt system for your Master Spa hot tub, we recommend:
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Verifying system compatibility
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Following a strict water testing routine
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Using high-quality spa-grade chemicals
Need Help With Your Master Spa Water Care?
Whether you’re using a salt system or traditional chlorine, proper water care protects your investment and ensures a better soaking experience.
Browse our full selection of chemicals, parts, and water care solutions at MasterSpasPartsOnline.com or contact our team for expert guidance.