The Power of Ozone
The Power of Ozone:
Elevating Your Hot Tub Experience to the Next Level
Ozone is one of the most effective options or upgrade you can add to a hot tub is a Corona Discharge (CD) Ozone System.
When paired with a traditional sanitizer like chlorine or bromine, ozone helps maintain cleaner, clearer water while reducing the amount of chemicals you need to add.
Ozone isn’t a replacement for sanitizers—but it is one of the best partners you can give your hot tub. In this guide, you’ll learn what ozone is, how it works, and why it’s one of my preferred systems for maintaining healthy, low‑maintenance water.
✅ What You’ll Learn
- Is ozone better than saltwater systems
- Do you still need to shock a hot tub with an ozonator
- Is ozone or UV better
- How to know if your ozonator is working
- What ozone smells like
- Whether ozone has disadvantages
- Why ozone is safe when used correctly
- How ozone helps reduce foam
🌬️ What Is Ozone?
Ozone (O₃) is a powerful oxidizer made of three oxygen atoms instead of the usual two. In hot tubs, ozone helps break down:
- bacteria
- viruses
- organic contaminants (sweat, saliva, urine, lotions, oils)
- biofilm inside
- plumbing lines
🔧 How Ozone Works in a Hot Tub
During filtration cycles—or through a dedicated circulation pump—ozone gas is injected into the water through a small injector. The smaller the bubbles, the more effective the oxidation.
Ozone works by:
- Oxidizing contaminants so your sanitizer doesn’t work as hard
- Breaking down biofilm inside plumbing lines
- Reducing total dissolved solids (TDS) by clumping particles for filtration
- Freeing up combined chlorine or bromine, improving sanitizer efficiency
Because ozone takes time to circulate, it cannot be used as the only sanitizer. It is designed to support chlorine or bromine—not replace them.
There are two types of ozone systems used in hot tubs:
⚡ Corona Discharge (CD) Ozone
The most modern and effective option. CD ozone produces higher concentrations, lasts longer, and is more efficient.
💡 UV Ozone
Uses ultraviolet light to create ozone but produces much lower output (typically under 0.5%). It requires long exposure times and is less effective in fast‑moving water systems.
CD ozone is the preferred choice for hot tubs.
🛠️ How to Add Ozone to Your Hot Tub
Most modern hot tubs can be equipped with an ozone generator. The system includes:
- An injector plumbed into the return line
- The ozone generator (a small box connected to the control board)
Your spa’s control system must support ozone so it can turn the generator on and off during filtration cycles.
🧪 What Chemicals Should You Use With Ozone?
Most modern hot tubs can be equipped with an ozone generator. The system includes:
- An injector plumbed into the return line
- The ozone generator (a small box connected to the control board)
Your spa’s control system must support ozone so it can turn the generator on and off during filtration cycles.
Ozone works best when paired with:
Granular Chlorine (Dichlor)
- Ideal for ozone systems. Add one teaspoon per person after each soak, then run the jets or clean cycle for 10 minutes.
- By the next day, your chlorine level may read zero—that’s normal when ozone is doing its job.
Non‑Chlorine Shock or Enzymes
- Use weekly to break down lotions, oils, and soaps that ozone cannot fully oxidize.
Mineral Sticks (Optional)
- Help kill bacteria and reduce chlorine demand even further.
🧼 Do You Need to Maintain a Sanitizer Level?
If your ozone generator is functioning properly, it’s normal for your test strip to show 0 ppm chlorine the next day. That simply means the chlorine you added after your last soak has been used up.
If you prefer a consistent reading, your only need to maintain 0.5–1.0 ppm of chlorine. The ozone is doing the rest.
If you go weeks without using your hot tub, add a maintenance dose of chlorine once a week.
🔍 How to Know When to Replace Your Ozonator
Most ozone generators last 3–5 years. Signs yours may be failing:
Indicator Light
- Some units show ozone production; others only show power. Check your ozone manual for more information.
The Ozone Smell
- Ozone has a fresh, slightly sharp smell—similar to the air after a thunderstorm.
Ozone Test Kits
Single‑use kits that give an approximate reading of ozone output and require cutting into the ozone line.
Declining Water Quality
- Cloudy water, increased chemical demand, or recurring issues may indicate a failing ozonator.
Bubbles at the Ozone Jet
- Bubbles at the Ozone Jet
Tiny bubbles (under 1 mm) indicate ozone injection. Large bubbles are usually just air.
📘 Additional Facts About Ozone
- Ozone used in hot tubs is safe when installed correctly and contained within the plumbing.
- Ozone dissipates before reaching the water surface, so it is not inhaled during normal use.
- The word “ozone” comes from the Greek ozein, meaning “to smell.”
- High ozone levels (like high sanitizer levels) can shorten the life of covers and pillows.
- Opening the cover every few days helps release trapped gases.
The Power of Ozone
Discover how a corona discharge ozone system keeps your hot tub cleaner, reduces chemical use, prevents biofilm, and improves water clarity year‑round.
🏁 Conclusion
A Corona Discharge Ozone System is one of the most effective upgrades you can make to your hot tub. It improves water clarity, reduces chemical use, prevents biofilm, and enhances the overall soaking experience.
While ozone doesn’t replace chlorine or bromine, it dramatically reduces how much you need—giving you cleaner, fresher water with less effort.
👉 Upgrade your Hot Tub Your Experience
If you’re ready to enjoy cleaner water and a more comfortable soaking experience, consider adding a CD ozone system to your hot tub. Check with your local dealer or online retailers to find a unit compatible with your spa.
Cleaner water, fewer chemicals, and a better hot tub experience are all within reach.
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