Top 5 Hot Tub Sanitizer Reviewed for 2020

A hot tub provides a great, relaxing experience, but over time, the water in the hot tub becomes dirty and contaminated due to lotions, make-up, sweat and dirt. All these contaminants not only make your hot tub experience less enjoyable but could also lead to infections.

It is, therefore, necessary to maintain the hygiene .There are many ways you could accomplish that, but none is as easy or effective as using mineral hot tub sanitizers. On this guide, we will provide you with the following information:

Benefits of using hot tub sanitizers

1. Less chlorine is required

Use of mineral sanitizers reduces the need for chlorine; hence you get to use less of it. The mere fact that you use less chlorine in your hot tub means that you don't have to deal with the disadvantages associated with chlorine like chloramines, odour and harshness to the skin which is caused by excessive use of chlorine.

2. They are more economical

Hot tub mineral sanitizes don't cost as much as bromine, chlorine or other sanitizers. Also, the mineral cartridge is changed once in a few months, depending on the rate at which your hot tub is used.

3. Easy to use and manage

When using mineral hot tub sanitizers, you don't need to measure chemicals before adding them to water. They also eliminate the need to wait before getting into your hot tub; you can add them and bathe right away. Awesome, right?

Limitations of using hot tub sanitizers

1. Might stain your hot tub

Copper is the main element in mineral sanitizers. It is also a common cause of staining in hot tubs. If your water source has a high copper content, then your hot tub is at a higher risk of getting stained.

If your hot tub develops stains due to copper, you could try using a metal sequestrant to prevent it from settling on your hot tub's surface. You should also note that using too much metal sequestrant could make your sanitizer ineffective.

2. You still need bromine and chlorine

Although they are effective, mineral sanitizers are not enough to effectively sanitize your hot tub. You need to add chlorine and bromine to clean the water thoroughly and kill bacteria and viruses.

Top 5 Mineral Hot Tub Sanitizers on the Market Reviewed and Top Pick

Zodiac W20750 Nature2 SPA Stick Mineral Sanitizer


This is one of the best solutions for hot tub sanitization. It is designed both for short term and long term use and has no health hazards. It is also very fast in cleaning and has received numerous positive reviews from its users in the past few years since its release.

On the downside, sometimes the stick falls apart because of extreme pressure. When this happens, you will hear a rattling sound.


  • Eco-friendly
  • Works well with chlorine
  • Helps in reducing chemical usage
  • It is swift and efficient in cleaning
  • Easy to use


  • High water pressure in your hot tub might cause the stick to fall apart
Jacuzzi ProClear Mineral Spa Sanitizer


This is a very effective mineral sanitizer and works well in hot tubs with a volume of up to 500 gallons. It also works well with all types of hot tub flow rates and maintains consistency in the PH balance of your spas water.

It keeps your hot tub water cleaner and sparkling, more than it would have been if you would have used chlorine alone.

The cartridge lasts for approximately 4 months and works perfectly with hot tubs with removable filter caps.


  • Does not require maintenance
  • Very easy to use
  • Turns water clearer and softer
  • CRT technology ensures maintenance of optimum pH levels
  • Fits perfectly to your existing filtration system
  • Does not stain your hot tub


  • Does not work well with all hot tub models
  • You have to follow specific instructions for it to work effectively


This sanitizer has a significant advantage as it does not require the use of chlorine and bromine to clean your hot tub effectively. It proficiently maintains your hot tub clean and disinfected for up to four months. It also fits on all types of spa filters.

It prevents algae and is effective with non-chlorine shocks, but on the downside, when compared to other sanitizers of its category, it is nor that effective.


  • Affordable
  • Easy to install and use
  • Does not require maintenance
  • Can handle hot tubs with a capacity of up to 600 gallons of water effectively


  • It is not as efficient as most sanitizers in its category
  • The mineral stick turns green due to the presence of copper


This sanitizer uses a combination of mineral technology and bromine to clean your hot tub.

The cartridge containing bromine lasts for 24 weeks while the mineral cartridge lasts four months; hence it requires minimal maintenance.

It reduced the use of bromine by up to 50%, but it is not suitable for use by people with sensitive skin.


  • It comes with replacement cartridges
  • It has child Reduces the use of bromine by up to 50%locks.
  • It is compatible with most hot tub water flow rates


  • Not suitable for people with sensitive skin


The Caldera Spas Monarch Mineral Spa Sanitizer 7235 utilizes positive silver ion technique to clean your hot tub. It eliminates the need for chemical use and is suitable for people with sensitive skin.

It is quite affordable and effortless to install and use. Its eco-friendliness and its efficiency in keeping your hot tub water clean, making it suitable for long term use.


  • Uses silver ions to clean your hot tub
  • Eliminates the use of chemicals
  • Very effortless to install and use
  • Requires minimal maintenance


  • It is not as effective as the sanitizers that are combined with chlorine and bromine
  • It requires consistent use to produce results

Factors to consider when purchasing mineral sanitizers

1. Your budget

Mineral sanitizers are priced differently depending on their quality and brand. You should choose one that is within your budget but doesn't compromise on quality. Always go for quality so that you enjoy a cozy bath.

2. Durability and ease of maintenance

If you plan on long term use of a mineral sanitizer, you should choose one that not only lasts long but requires minimal maintenance. A bath tub sanitizer that requires minimal maintenance will cost you less.

3. Volume specification

Each mineral sanitizer is meant to be used for a specific water volume. Exceeding the volume of hot tub water specified on the sanitizer might make it less effective.

Tips on how to balance the level of sanitizers in your hot tub
• Test the chlorine levels to ensure they are between 3 and 5 mg/l
• Test the pH level to endure it is between 7.2 and 7.6
• Test for calcium hardness, it should fall between 100 and 200mg/l
• Test for alkalinity, it should fall between 125-150mg/l
• Check whether the water is foaming

If one or more of your readings are inconsistent to these levels, add or reduce the concentration by following the instructions on your test kit. You should also consider changing your hot tub's water every few months to avoid chemical saturation and the odor and irritation that comes with it.

When testing and adding chemicals, always ensure that you follow the instructions given to the letter as a mistake in reading or adding chemicals can significantly cause an imbalance in the levels of chemicals in your hot tub. An imbalance in chemical levels can not only damage your hot tub but also irritate your eyes and skin.


Maintaining the hygiene and water clarity of your hot tub is a crucial factor in ensuring that you get the most out of your hot tub in terms of enjoyment and longevity. Mineral sanitizers not only last long but reduce chemical usage, making them the best choice for hot tub sanitization.

A well sanitized hot tub is full of health. You won’t experience irritation and all the negative vices that come with a dirty hot tub.

We have reviewed some of the best mineral sanitizers in the market to help ease your search. This text has also given a few factors you should consider when buying a mineral sanitizer. You should also follow the tips we have given on how to maintain the appropriate chemical levels in your hot tubs water.

With all this knowledge, we'd say that you're ready to not only purchase the right product but also keep your hot tub in good condition.