Non-Chlorine Shock Hot Tub Treatment: Your Guide to Gentle Water Care

Published on

May 31, 2024

A hot tub is your oasis, a perfect retreat after a long day. But keeping the water clean and safe is crucial, and that's where a non-chlorine shock hot tub treatment comes into play. This method cleans your hot tub without chlorine, which is great for avoiding the strong smell and potential irritation that chlorine can cause.

Using a non-chlorine shock for your hot tub means opting for a gentler yet effective way to eliminate organic pollutants like sweat, oils, and cosmetics. The process is simple and ensures that your hot tub remains a haven of relaxation, free from harmful bacteria and cloudy water, without relying on chlorine.

Remember, regular maintenance with non-chlorine shock keeps your hot tub inviting and ready for you to unwind at any time. It’s a non-irritating, odor-free solution that ensures your spa experience is always top-notch.

Non-Chlorine Shock: The Basics

Non-Chlorine Shock: The Basics

In your hot tub maintenance routine, you'll encounter different ways to keep the water clean. Non-chlorine shock is an option that can be very effective without the use of chlorine.

What Is Non-Chlorine Shock?

Non-chlorine shock, often referred to as MPS or potassium monopersulfate, is a chemical oxidizer. It keeps your hot tub water clear by breaking down non-living organic substances like lotions and sweat.

Unlike chlorine, MPS doesn't kill bacteria, but it does help to make your sanitizer more effective by eliminating contaminants that could use up the sanitizer in your hot tub. It is important to note that chlorine or another sanitizer is still necessary to ensure proper water sanitation and safety.

Benefits of Non-Chlorine Shock for Hot Tubs

Here are the benefits of non-chlorine spa shock:

  • Gentle on Hot Tub Surfaces: Since MPS doesn't have chlorine, it's less harsh on hot tub surfaces and equipment.
  • No Chlorine Smell: Your hot tub won't have that typical chlorine odor after treatment, making your soaking experience more pleasant.
  • Works Fast: It acts quickly to break down non-living organics, so you can use your hot tub soon after treatment.
  • Boosts Sanitizer Effectiveness: By removing the materials that compete with your sanitizer, MPS makes the sanitizer in your hot tub water more efficient.

Types of Hot Tub Sanitizers

Types of Hot Tub Sanitizers

When you use a hot tub, keeping the water clean and safe is vital. Here's where sanitizers come in—they kill bacteria and other germs. There are three types of sanitizers for hot tubs:

  1. Chlorine Sanitizers
  2. Bromine Sanitizers
  3. Mineral Sanitzers

1. Chlorine Sanitizers

Chlorine sanitizers for hot tubs release chlorine compounds that produce hypochlorous acid and hypochlorite ions. These effectively kill bacteria and viruses by breaking down their cell walls. Chlorine also reacts with organic contaminants, forming chloramines that are removed through maintenance and shock.

Maintaining chlorine levels between 3-5 ppm ensures the water remains clean, safe, and free from odors. This provides comprehensive and continuous sanitization. There are different types of chlorine sanitizers:

  • Chlorinating granules
  • Chlorine tablets
  • Trichlor chlorine
  • Sodium hypochlorite
  • Chlorine concentrate
  • Chlorine shock
  • Lithium hypochlorite
  • Lithium hypochlorite
  • Liquid chlorine
  • Dichlor chlorine
Hot Tub Chlorine Sanitizers

2. Bromine Sanitizers

Bromine is another common sanitizer. It's great for people with sensitive skin, as it's usually gentler than chlorine. Bromine sanitizers work by dissolving into the hot tub water to form hypobromous acid. This effectively kills bacteria and other microorganisms by penetrating their cell walls and disrupting their metabolic processes.

Bromine remains active longer at higher temperatures and maintains its efficacy across a wider pH range compared to chlorine. It provides continuous and reliable sanitization for hot tubs with less frequent dosing.

Like chlorine, it comes in:

  • Bromine granules
  • Bromine salts
  • Bromine sticks
  • Bromine tablets

3. Mineral Sanitizers

Minerals like silver and copper can also sanitize hot tub water. Mineral hot tub sanitizers utilize natural minerals like silver and copper to sanitize water. As water flows through mineral cartridges, these minerals release ions that kill bacteria and inhibit algae growth.

This method reduces the need for traditional chemicals like chlorine or bromine, providing continuous, low-maintenance sanitization. Mineral sanitizers create softer, gentler water that is less irritating to the skin and eyes, while maintaining clear and clean hot tub conditions with less traditional chemicals.

To reduce the amount of sanitizer needed, check out how to use a hot tub salt water conversion kit.

Hot Tub Water Chemistry

Hot Tub Water Chemistry

Maintaining the right water chemistry in your hot tub is crucial for ensuring the water is safe and comfortable to swim in. This involves managing pH levels, alkalinity, calcium hardness, and sanitizer levels efficiently.

Importance of pH Levels

Your hot tub's pH level measures how acidic or basic the water is on a scale from 0 to 14. Aim for a pH range of 7.2 to 7.8. If the pH is too low, the water can corrode equipment and irritate your skin. Too high, and it can cause scale buildup and make sanitizers less effective.

Parameter Range/Condition Effects
Ideal pH range 7.2 - 7.8 Keeps a balanced water environment.
Low pH Below 7.2 Can cause corrosion and irritation
High pH Above 7.8 Can create scale and reduce sanitizer effectiveness

Alkalinity and Calcium Hardness

Alkalinity acts as a buffer for pH, helping to keep it stable. You want your hot tub's alkalinity to be between 80-120 parts per million (ppm). Calcium hardness measures the amount of dissolved calcium in the water. The right calcium hardness prevents damage to the hot tub's surface and equipment.

  • Total Alkalinity (TA): Keep between 80-120 ppm to stabilize pH
  • Calcium Hardness: Ideal levels are 150-250 ppm

Understanding Sanitizer Levels

Sanitizers like chlorine and bromine keep your water clean by killing bacteria and other organisms. For chlorine, maintain free chlorine levels between 1-3 ppm and combine available chlorine at appropriate levels to protect against the sun's UV rays.

Free chlorine in hot tub maintenance is the active chlorine available to disinfect and sanitize the water.

  • Free Chlorine: Maintain 1-3 ppm for clean and safe water
  • Cyanuric Acid (CYA): Helps keep chlorine levels stable, check product guidelines for ideal amounts

Remember to regularly check and adjust these chemical levels to keep your hot tub water in prime condition for a safe and enjoyable experience.

How to Shock Your Hot Tub

How to Shock Your Hot Tub

Shocking your hot tub helps in keeping the water clean and safe for use. It's a key part of your hot tub maintenance routine.

When to Shock Your Hot Tub

Shock your hot tub regularly to maintain water quality. Do this at least once a week as part of your regular maintenance, or more often if:

  • The hot tub is used frequently.
  • After a high number of bathers have used it.
  • You notice a strong odor or cloudy water.

Step-by-Step Shocking Process

Prepare for Shocking

  • Step 1: Ensure the hot tub is on but with the jets turned off, keeping the circulation pump running.
  • Step 2: Wear safety equipment like gloves to protect your skin.

Measure and Add Non-Chlorine Shock

  • Step 3: Check your non-chlorine shock product's label for the correct dose.
  • Step 4: Measure the advised amount based on your hot tub's water volume.
  • Step 5: Slowly add the non-chlorine shock into the hot tub, near a water inlet to help spread it evenly.

After Shocking

  • Step 6: Wait for the recommended time on the shock treatment package before you use the hot tub again.
  • Step 7: Testing the water after the treatment using test strips or a digital hot tub tester ensures it is safe for use.

Remember to adhere to the manufacturer's instructions for both the safety and effectiveness of the shock treatment. Non-chlorine shocks are suitable for regular maintenance without too much chlorine (super chlorination), keeping the water clear and preventing unwanted bacteria growth.

Troubleshooting Water Problems

Troubleshooting Water Problems

When you face issues with your hot tub water quality, it's usually down to imbalances or contaminants. Here are simple steps you can follow to get your water clear and clean.

Dealing with Cloudy Water

If your hot tub water turns cloudy, it's often due to tiny particles that can't be filtered out. These can come from various sources:

  • Organic matter: Such as body oils, dead skin cells, lotions, and cosmetics.
  • Chemical imbalances: Incorrect pH or sanitizer levels.
  • Old or dirty filters: Not capturing the small particles effectively.

Here's what you can do:

  1. Test your water: Check the pH and sanitizer levels and adjust them if needed.
  2. Clean or replace your filters: This helps capture any debris or particles causing cloudiness.
  3. Shock your spa: Use a non-chlorine shock treatment to clear the water without adding more chlorine.

Removing Algae and Contaminants

Algae and contaminants in your hot tub not only look bad but can also affect your health. Algae can bloom due to high pH levels or lack of sanitization.

To tackle this, follow these tips:

  • Test and adjust: Ensure your water's pH is within the recommended range.
  • Sanitization: Add sanitizer to deal with any biological growth.
  • Shock treatment: Regular non-chlorine shock treatments can help keep the water clear by breaking down organic contaminants without leaving any residue.

Keep these steps in mind to maintain a healthy and inviting hot tub environment.

Hot Tub Maintenance Tips

Hot Tub Maintenance Tips

Keeping your hot tub in top shape ensures that you enjoy clean, safe water whenever you take a soak. Follow these straightforward maintenance tips for daily and weekly care, managing heavy usage, and understanding how non-chlorine alternatives work alongside sanitizers.

Daily and Weekly Maintenance

Daily Checks: Every day, take a moment to ensure your hot tub's water level is sufficient, and check the filters for any obvious debris. This prevents clogs and maintains good water flow.

Weekly Care:

  • Test Water: Use test strips to check your hot tub's pH, alkalinity, and sanitizer levels.
  • Sanitize: Add sanitizer to keep your water clean. The ideal level is 1-3 parts per million for chlorine and 3-5 for bromine.
  • Rinse Filters: Clean the hot tub filters with water weekly to remove dirt and debris.

Dealing With Heavy Use

After a party or a period of heavy use, contaminants like sweat, oils, and lotions can build up. Non-chlorine shock is excellent for oxidizing these, breaking them down without affecting sanitizer levels. For best results:

  • Shock after heavy use, to cleanse the water.
  • Check sanitizer levels and adjust as needed to ensure the water remains safe for use.
Hot Tub Heavy Usage

Does O-Care Replace Chlorine?

No, O-Care does not replace chlorine but significantly reduces the need for various hot tub chemicals. It streamlines water care by:

  1. Minimizing Scale and Skin Irritation: O-Care's natural mineral salts make the water gentler on the skin and help prevent scale buildup on hot tub components. This ensures a more comfortable and hassle-free experience.
  2. Enhancing Sanitizer Effectiveness: While O-Care does not eliminate the need for chlorine or bromine, it enhances their effectiveness. By maintaining water balance and reducing the organic load, O-Care allows sanitizers to work more efficiently, thus lowering the amount of chlorine required by up to 78%.
  3. Reducing Chemical Dependency: O-Care's unique formula minimizes the reliance on harsh chemicals. Fewer chemicals are added to the water, creating a safer and more eco-friendly environment for users, especially beneficial for those with sensitive skin or allergies.
  4. Prolonging Hot Tub Life: By preventing sediment buildup and reducing chemical usage, O-Care helps extend the lifespan of your hot tub components. This not only saves money in the long run but also ensures your hot tub remains in optimal condition.

Using O-Care in your hot tub maintenance routine leads to softer, odorless water and a more enjoyable soaking experience without the heavy use of traditional chemicals.

Healthy Hot Tub Environment

Healthy Hot Tub Environment

When you use your hot tub, substances like sweat, body oils, and cosmetics can get into the water. These substances, along with bacteria from our bodies, can affect water clarity and cleanliness. Here's what you need to do to control these issues:

  • Limit bather load: Too many people in the hot tub can increase contaminants and strain the sanitizing system. Stick to the recommended number of bathers.
  • Shower before entry: Encourage everyone to take a quick shower before getting into the hot tub.
  • Regular Cleaning: Clean the tub and filter according to the manufacturer's guidelines.

Hot Tub Accessories and Additives

Hot Tub Accessories and Additives

Maintaining a clean and comfortable hot tub environment requires a few key accessories and additives. Here's how you can enhance your spa experience and keep the water clear.

Ozonators and UV Systems

Ozonators work in your hot tub by generating ozone, a powerful oxidizer that breaks down contaminants. Installing an ozonator can reduce your chemical usage because it naturally helps maintain clear water.

UV systems use ultraviolet light to sanitize the water. When water passes through a UV system, the light kills harmful bacteria and viruses. These systems support your regular spa care routine but should not replace your regular spa shock treatments.

  • Ozonators: Less chemical use, helps with water clarity.
  • UV Systems: Kills bacteria and viruses, and supports regular spa care.

Water Balancers and Clarifiers

Maintaining water balance is crucial for your comfort and your hot tub’s longevity. You should regularly check and adjust pH levels and alkalinity to prevent damage to your spa and keep the water pleasant for soaking. Use water balancers to make these adjustments easy.

Hot tub clarifiers are another helpful additive. They work to group small particles into larger ones that the filter can easily catch, leaving your spa water sparkling and inviting.

Remember, while ozone and UV systems are helpful, regular use of spa shock, a non-chlorine oxidizer, is essential to break down organic matter that builds up in your hot tub. These additives and accessories, along with a good filter, will make your spa experience much more enjoyable.



Using non-chlorine shock in your hot tub care routine is important. It keeps the water clean by breaking down organic matter and other stuff you can't see. This process, called oxidizing, makes sure the water stays clear and safe for you to enjoy.

Remember, sanitizing and oxidizing are like a team. Sanitizers kill bacteria and germs in the water. Oxidizers like non-chlorine shock remove leftovers from the sanitizing process. This tag-team approach means your hot tub is always ready for a fun and relaxing soak.

When you use non-chlorine shock, you're choosing a gentle way to handle your hot tub’s needs. It’s easy on your eyes and skin, and it won't mess with the water's balance.

Integrating O-Care into your hot tub maintenance routine not only enhances your spa experience but also promotes a healthier, eco-friendly environment.

Ready to transform your hot tub care with O-Care? Purchase O-Care and discover the benefits firsthand. For personalized support, access our online water assistant, and don't forget to download our app for detailed instructions, maintenance tips, and exclusive offers. Start enjoying softer, cleaner, and safer spa water today!

Frequently Asked Questions

Frequently Asked Questions

How can you find the most effective non-chlorine shock for your hot tub?

To find the best non-chlorine shock, look for products with positive reviews and those recommended by hot tub professionals. Check for the active ingredients to ensure they're suitable for your tub's specific needs.

Can you mix chlorine and non-chlorine shock treatments in a hot tub, and if so, how?

Yes, you can use both types of shock in your hot tub but not at the same time. Alternate their use to balance the water. Always follow the manufacturer's guidelines for the time interval between different treatments.

After treating a hot tub with non-chlorine shock, how long should you wait before using it again?

You should wait until the water chemistry levels, such as sanitizer and pH, are within the proper range. This usually takes at least 15 minutes after adding a non-chlorine shock. Always test the water before entering.

How do you properly determine the amount of non-chlorine shock needed for your hot tub?

The amount of non-chlorine shock you need depends on the size of your hot tub and the current water condition. Read the label for dosage recommendations and use testing strips to gauge the required treatment.