Why Does Hot Tub Use So Much Chlorine?

Can I Use Windex To Clean My Hot Tub?

Why Does Hot Tub Use So Much Chlorine?

It is very critical to have the right amount of chlorine in your hot tub.This is because of its function in keeping bacteria at bay as far as your hot tub is concerned.

Additionally, you can be sure of the safety of your hot tub water if you have the correct amount of chlorine or sanitizer in it.

However,your chlorine levels might keep falling,causing you to use more chlorine than normal.You might be asking, why does my hot tub use so much chlorine? It is normal for choline to decay over time.

However,the problem of why chlorine may fall too quickly might emanate from incorrect PH levels.

As long as your water is overly contaminated and has incorrect pH levels, chlorine sustainability will be a problem.

The recommended chlorine levels are between 2 and 4 ppm.Many water problems might arise from using unclean hot tubs.To ensure clean hot tubs, routine water care is vital.

However, if there are variations in the number of people who use the hot tub, changes in the soaking duration, and other factors, the chemical levels of your hot tub can be affected.

I recommend that you always test the water before you soak in it. If you realize that your chlorine levels are not in the proper range, you are better off not soaking in there.

Again, it is critical to treat your water when you finish soaking, maintain proper pH, and correct chlorine levels. 

Does Chlorine Decay In My Hot Tub?

Yes.Chlorine will get used up when it continues to perform its eating up water contaminants in your hot tub.

Again, chlorine is lost into the atmosphere when it is continually exposed to the sun’s UV rays.This dissipation into the atmosphere is the reason behind the familiar Chlorine smell.

Consequently, many people will add more chlorine at a much higher level (about ten ppm) to sanitize the water and kill everything.

Why Does Hot Tub Use So Much Chlorine?

After some time, it will drop to about 4 pmm, the safe level for soaking in. chlorine levels can be checked using a simple test strip.

With time, the chlorine will drop further down until it is necessary to add more so that the water is sanitized again.

This will be the normal cycle that will be repeated every once in a while. Indeed, many people find it best to shock their hot tub water and add chlorine after each use.

As they leave their hot tub water at higher levels, the chlorine continues to do its work, and it will drop to safe levels by the time they will be using it again.

Effective bromine or chlorine addition is vital if you want healthy water in your hot tub. Without a proper schedule to achieve this, it is impossible to keep your water sanitized.

Indeed, it is very easy to keep the routine after getting used to a regular pattern of chlorine addition.

Chlorine test strips should be kept safe to avoid contamination. You will need about 45 minutes for the water to be sanitized in normal circumstances, although this might vary depending on different factors.

Again, it is advisable always to read the instructions that come with the chlorine package to avoid the wrong application of this wonderful water treatment chemical.

Remember, if you add too little chlorine, your water will not be safe for bathing, while adding too much will mean that you have to wait longer before the chlorine levels drop to safe levels.

Can I Do Anything To Stop Chlorine In My Hot Tub Dropping Too Soon?

Yes. Sometimes, chlorine will drop fast in your hot tub due to various factors.This means that it is really hard to maintain the levels at the recommended range. Several possibilities dictate this.

Improper PH levels – It is necessary to have the recommended water alkalinity and PH levels in your hot tub.

This is the only practical way to have easy maintenance of your water chemistry. If you are not consistent and regular in adjusting pH levels in your hot tub, it is hard to steer away from water problems.

Since chlorine is very sensitive to pH imbalance, improper pH levels will scarcely facilitate chlorine to work efficiently.

Consequently, you will find yourself adding more chlorine frequently, and it might be added to maintain the proper levels due to the pH imbalance.

Direct sun– Due to chlorine’s susceptibility to the sun’s UV rays, your hot tub’s chlorine levels may drip at a higher rate than normal. 

Consequently, it is advisable to use a sunshade, an umbrella, or a sail to ensure sunshine does not cause drastic drops of chlorine in your water.

Additionally, the hot tub cover comes in handy, so do not forget to use it whenever you are not using your hot tub.

However, ensure that you remove the cover as soon as you shock the water to dissipate the initial vapor.

This is crucial since leaving the hot tub covered after chlorine addition will make the cover’s vinyl vulnerable to attacks by the vapor.

Heavy usage – As you continue using your hot tub, it gets dirty, and chlorine eats up the dirt as a way of keeping the water clean and safe.

Consequently, heavy hot tub usage dictates more work for chlorine, leading to its faster depletion rates.

Contaminated water – again, if the water in your hot tub is contaminated, the chlorine will have to fight this contamination, leading to faster chlorine depletion rates.

Water gets contaminated faster if you are getting into the hot tub before bathing. It is recommended to first bathe before using the hot tub and avoid food spillage in the tub.

Leaving the cover open also leads to water contamination and consequent faster choline usage.

Do Chlorine Levels Drop Within 24 Hours?

Yes. Normally, it will take about 24 hours for chlorine levels to drop in your hot tub. Consequently, it is best to check your levels every day and ensure that it stays within the recommended range of between 2 and 4 ppm.

To ensure even chlorine saturation in your hot tub, you need to run the jets so that the water circulates well.

This comes as an appropriate way to ensure that there are no concentrated areas in your tub while other areas are not concentrated.

Are There Alternative Sanitizers For My Hot Tub?

Yes. There are other systems that you can use and avoid chlorine. While chlorine is very powerful in cleaning water, many people hate sitting in chlorine-concentrated soup.

With the availability of environmentally-friendly products, you do not have to use chlorine in your hot tub if you don’t want to.

You can use other alternative methods.While these other systems are effective, you might still; need to use chlorine from time to time in your hot tub.

Therefore, your chlorine usage will drop, but you might not be able to eliminate it.

In spite of the less irritating and more environmentally clean alternatives, chlorine stands out as the only recommended chemical to be used in public hot tubs.

This is because chlorine is more guaranteed to maintain your water bacteria-free. However, you can use chlorine or the alternatives since the idea is to sanitize your water and make it safe for soaking in.

Can plug and play hot tubs be used in winter?

If your hot tub has many users, you will need to use chlorine regularly to keep it bacteria-free.

Is It Safe To Use My Hot Tub With Higher Chlorine Levels?

No. As already implied, there is a safe chlorine range within which you can soak in your hot tub.

However, if the levels are higher above this recommended range, several things might happen to you. Higher chlorine levels may result from accidentally adding too much chlorine.

Ideally, if your hot tub chlorine levels are above three parts per million as measured from your test strip, your hot tub is not safe to be used.

Defiantly ignoring this recommendation might lead to itchy, red skin and eyes. Additionally, you will have respiratory issues.

With chlorine levels beyond 5ppm, you will be susceptible to chlorine poisoning that might lead to vomiting, nausea, and difficulty breathing.

While chlorine is handy in cleaning your hot tub water and killing bacteria, too high chlorine levels might cause unwanted problems.

Therefore, it is advisable to always check chlorine levels with a test strip before getting into your hot tub.

You will find it necessary to have these handy test strips at your disposal for frequent testing of your hot tub water.This is an extremely easy way to know the pH levels in your water.

To use a test strip, take a small water sample in a clean glass or a plastic container.This water sample should be from the center of the hot tub, from about an elbow depth.

Place your test strip in the water and let it sit for fifteen seconds. However, you can still dip the test strip in the hot tub itself since it is okay.

Indeed, I do this when I feel that I am running short of time in the morning and needs to test my water before I go to work,

Your test strip comes with colors that should be used for comparison when testing your hot tub water.

It is critical to follow the instructions so that you are conversant with chlorine levels in your hot tub.

However, remember that various test strips are meant to test different things in your water.

For instance, there are test strips for testing chlorine/bromine, alkalinity, and pH.

On the other hand, there are test strips for calcium, water hardness, and other things.This is where the instructions on the test strip package are handy.

Are High Levels Of Chlorine Harmful To The Hot Tub System Itself?

Yes. It is critical to emphasize the importance of bromine or chlorine levels in hot tubs. Indeed, these levels need to be watched closely.

If chlorine levels are within the recommended range (one to three parts per million), they kill bacteria effectively.

However,higher levels than this can cause many issues.For instance, if your chlorine levels are higher than recommended, they might degrade your hot tub surfaces at a faster rate.

Again, filters, water pillows, and other surfaces might be impacted negatively if there are high levels of chlorine in your hot tub.

Although both chlorine and bromine are strong chemical compounds, chlorine is worse than bromine.

Hot tub equipment is negatively impacted by high bromine or chlorine levels. Indeed, with prolonged higher levels of these chemicals, pipes and the lining can degrade.

Can I Bring Down The Levels Of Chlorine In My Hot Tub If They Are Too High?

Yes. It is possible to lower the chlorine levels in your hot tub. While it is easy to put more chlorine than required, it is not as easy to lower the levels once they exceed the recommended levels.

Although people depend on smell to know if they have overdone it, the best way to know the status of your hot tub is to perform a test using a test strip.

From the strips reading, you will be able to know whether to reduce or raise the chlorine levels in your hot tub.

Well, if your chlorine levels are higher than they should be, but the jets on and let the water circulate with your hot tub cover open.

The chemicals will be absorbed in a better way by the water. Again, you can leave your tub in a way that sunlight destroys the chlorine.

However, the fastest way to deal with excess chlorine in your tub is to empty it and replace it with fresh water.

Remember that hot tub water might harm your grass, so you need to be careful where you direct the drained water.

But if you do not want to drain your hot tub, you can dilute the water with fresh water. This can be done by removing part of the water and replacing it with freshwater, after which you test to see if the problem is addressed.


The purpose of chlorine in hot tubs is to kill bacteria and clean ensure cleanliness in the water. As long as the water is dirty, the chlorine will strive to get it clean.

However, sometimes chlorine gets used too fast due to the state of the water or the hot tub. If the water is contaminated, more chlorine will be needed.

Again, the pH is not balanced; more chlorine will be used up.Therefore, it is essential to ensure the correct levels of pH and to avoid sunlight as well for your hot tub to use reasonable quantities of chlorine. 


Hi! I' am Tom. I was a manager in one of the biggest stores for over 10 Years, am also an SEO by night. I don't like to call myself a blogger; they are very analytical, do email marketing, and know all SEO stuff. I faced many questions from customers about different products, and there was hardly any help on the internet. After learning all the things about these products as a manager the hard way, I decided to start a blog and help other people.

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