How To Choose The Best Water Softener Tablets for Humidifier?

 water softener tablet for humidifier

Water softener tablets remove minerals that create white dust caused by hard water in your humidifier. They also help in cleaning the air you breathe and works well while your humidifier operates.

Essentially, water softener tablets for humidifier give better benefits and cost-efficient.

Understanding Water Softeners

understanding water softener

Living in a place where water hardness is of critical concern, softening it is a great task and requires much consideration.

After talking about using soft water in humidifiers, I got tons of messages regarding using water softener tablets too. And so I thought I could use this for my next topic.

Many people fill their humidifiers with tap water and even hard water to cut immediate costs.  However, hard water contains a number of dissolved minerals.

If used in humidifiers, hard water emits white dust which contains minerals such as calcium and magnesium. These specks of dust will accumulate and build up over time, causing serious damage to our humidifiers and pieces of furniture.

How to Soften Water at Home

how to soften water at home

There are different ways you can prevent mineral buildup in your humidifier and prolong its life. The safest way to protect your device is to use distilled water, but, it is also the most expensive choice.

When it comes to cost-effective measures, using hard water or tap water is the common practice in most households. However, such measures also come with a price.

In the US, we have around 85% moderately hard water and softening it is a common concern. A lot of water treatment facilities offer various water softening technologies. But, they often charge expensive upfront payments.

I say water softening should not be a headache, it should be within the budget range while and not compromising quality.

Hard Minerals

hard minerals in water

A quick refresher on the water softening process. Water softeners chiefly eliminate positive calcium (Ca2+) and magnesium (Mg2+) ions.

These two minerals are the main cause of water hardness. In other words, these are the white dust that piles up inside your heaters, pipes, and fixtures.

Calcium and magnesium are the components usually regarded as 'hard or hardness minerals'. Sometimes, if the iron contents are high, they are also removed during the softening process.

Water Softening Methods

Water Softening Methods

Water softening involves an extensive method because it reduces the hardness of water in households. Not to mention how hard your house water could be.

Your initial step to determine if you got soft or hard water is to have it tested in the laboratories. If your result shows you have higher calcium, iron, and magnesium contents, then your water is hard.

This is the time you need to consider if water softener will improve your household maintenance.

Different Methods

different methods of water softening

Softening your water at home can be achieved by means of the following:


Boiling is the easiest option to soften your home water but not a convenient method since you need to boil water every time you need to refill. Another thing to note is that you need to let it cool down before you are able to use it on your humidifier.

I find this option cheaper but not user-friendly unless of course you no longer have any other choices. I also found out that some minerals and contaminants do no get killed in boiling water temperature.

It only removes the calcium, iron, and magnesium elements. If your water source is not yet tested to be safe, boiling it may also not be a solution.

Reverse Osmosis System 

Getting a reverse osmosis system is an upgrade to your home maintenance since your water will be filtered and can be even safe for drinking.

But then, it is an expensive upfront payment to get one and an added cost to your utility bills.

Water softener technologies

Apart from having a reverse osmosis system, you can also take advantage of water softener technologies to get rid of household water hardness.

You will notice immediate changes once you start using water softeners. You will no longer see cloudy utensils and fixtures, plus fabrics are softer and so your skin moisture is balanced.

Water Softener Tablets

Water softener tablets are quick answers in solving humidifier mineral buildups. These are convenient tablets which you can easily add inside your water reservoir.

Water Softener Tablets

water softener tablets for humidifiers

With all the softening methods I mentioned above, water softener tablets provide immediate effects. They are compact, easy to use, and very much versatile.

Remember that water becomes soft when it undergoes an ion exchange where the hard ions (calcium and magnesium) are exchanged for sodium or potassium ions (or salt).

The ion exchange happens when water runs through the tank, it contacts with resin beads and the calcium and magnesium ions switch places with the sodium ions. These resin beads contain sodium or potassium ions.

What Are They Made of?

NaCl structure

There are many water softener tablets available in the market that you can easily drop or put inside the humidifier water tanks.

The tablets then release the sodium or potassium ions and replace the calcium and magnesium elements they find in the water. This is where softener tablets play a vital role in performing an ion exchange.

But what are they made of? I received a message from one concerned reader verifying the contents of the water softener tablets.

Essential Components

essential components of water softeners

I know a lot of you also wanted to understand the chemical composition of these tablets. You want to ensure that the air you breathe at home is safe, clean, and free from harmful elements.

Just like me, I am also skeptical of the additives I use especially in my humidifier. Based on my research, most water softener tablets are made of sodium chloride (NaCl) or potassium chloride (KCl).

These are salt-based water softeners, however, if you are keen about inhaling too much salt or sodium content, you can opt for a basic water softener.

A significant component of water softener tablet is Silver (metallic) which composes at least 0.018% - 1.4%. Silver (Ag) has an antibacterial effect and is a popular component in the treatment of water.

Inhaling Sodium

sodium content

Most people are concerned with their sodium levels especially those who are suffering from heart diseases. To avoid adding the risk of potential sodium-level increase, make sure that to consult with your doctor first, prior to using water softener tablets.

Sodium Chloride

Moderately hard water needs at least 8 grains of sodium chloride or NaCl per gallon. If you are watching your salt intake, you may opt for a salt alternative such as using potassium chloride or KCl.

Potassium Chloride

This is a low-sodium alternative which uses a minimum amount of potassium transported to the water. Just like sodium chloride it also removes hard water minerals and reduces accumulation of tank residues.

Potassium chloride is 99.9% sodium free but, if you are suffering from kidney or other renal issues, you need to consult with your doctor before using this water softener.

You have an option to go for salt-free water softeners which use salt alternatives.

Benefits of Water Softener Tablets

benefits of water softener tablets

Most water softeners come in a liquid form which needs you to pour in every time you add or change the water. Adding and replacing water softener liquids need effort and is time-consuming.

Good thing, there are water softener tablets dedicated to humidifiers. These tablets take care of cleaning your water tanks and eliminate calcium and magnesium buildups.

  • They also ensure that no residue or molds are left that can cause bacterial growth that can be released into the air.
  • Water softener tablets work efficiently with almost all types of portable humidifiers including cool mist, warm mist, ultrasonic, and vaporizers.
  • Cleaning is also a breeze with these tablets since they do contain antibacterial properties.

Water Softener Tablets for All Types of Humidifiers

best water softener tablets for humidifier

Water softening prolongs the life spans of water-based household machines, such as laundry machines, heaters, air conditioners, and of course humidifiers.

Using water softener tablets for the portable humidifier is an inexpensive option which can last longer up to 45 days. These are the 3 best water softener tablets that perfectly work with humidifiers:

BestAir HCC31, Humidifier Demineralization Treatment Capsule, 1 Pink & Green

With BestAir HCC31 Humidifier Treatment Capsules, you can reduce the time, effort, and demand to keep your humidifiers clean, and free from mineral buildups. It is compatible with all types of humidifiers such as cool mist, warm mist, ultrasonic, and even vaporizers.

BestAir water softener capsules have antimicrobial treated to stop the growth of odor-causing bacteria & mold. It is easy to use, you simply toss it inside the humidifier water tank or base.

The capsules will stay for about 45 days if you have at least 2 gallons or less. It keeps tanks clean of hard mineral deposits made by hard waters.

Even so, you can enjoy the benefits of soft water for 30 days for larger water tanks, with a maximum of 5 gallons capacity. Each capsule works excellently with moderately hard to very hard water with 70%-80% effectiveness. This is based on calcium and limescale buildups.

Apart from its water softening capabilities, it also kills bacteria and prevents mold and reduces residues. Each side of the capsule has its unique properties including water softener on one side and antimicrobial on the other. It also comes in different variants and prices also vary.

If you are looking for an affordable alternative to using distilled water, adding BestAir treatment capsules is an excellent choice.

Holmes Humidifier Water Treatment Tablets, Pack of 15, 1" Tablet

Holmes Humidifier Water Treatment Tablets

Each pack of Holmes Humidifier Water tablets contains 15 tablets, every tablet is an inch wide, that dissolves in the water tank or base. It is compatible with all types of humidifiers and is easy to use.

You simply add one tablet in the humidifier water reservoir or base and it can last for one week.

It softens the water from moderate to very hard and reduces mineral accumulation. Among its unique features, Holmes humidifier water treatment tablets manage unpleasant odors.

One of its active ingredients is the antimicrobial properties which kill bad bacteria and prevent mold, and mildews. The tablets do not cause stains on the water base and tanks and make cleaning easier.

Price wise, this specific brand goes in between middle to high-end range.

Best Water Softener Tablet for Ultrasonic Humidifier

Not all water softener tablets work for all types of humidifiers. It may work but not as expected, so to ensure you get all the right kinds of softener tablets, here is one certified brand for ultrasonic humidifiers.

Hunter 31960 Demineralization Tablet for 31004 Ultrasonic Humidifier

The Hunter 31960 demineralization tablets are meant to extend the life of your humidifier and provide a lot of advantages with just minimum efforts.

They reduce white dust surrounding your humidifiers and lessens residues for easier cleaning. White dust is a byproduct of minerals such that of calcium, magnesium, and iron that are present in hard water.

These specks of dust are usually released into the air mostly when the humidifier is operating. And, as a result, tend to accumulate and clog up filters and cause damages.

These demineralization tablets remove the harmful minerals from hard water and eliminate white dust buildup. You can simply add one tablet in the tank even while the humidifier is running. For excellent results, you can use 1 tablet per week.

However, they do specialize in ultrasonic humidifiers but it does work with other types but on low to an average rating.


Where you want to use soft water is an essential question, to begin with. If your goal is to use it in your portable humidifiers then go for softener tablets.

To sum up, what we have discussed, soft water is feasible by doing any of the water softening methods. You can do it by means of boiling, using a reverse osmosis system, water softener technology, and through water softener tablets.

Using water softener tablets exceedingly improves humidifier performance by decreasing mineral buildups and removing hard ions.

I hope this article has answered all of your concerns regarding how to conveniently soften hard water upon using portable humidifiers. In fact, I have provided water softener tablets that will work on all types of humidifiers and even for specific types too.

So finally, you know how to soften your water by means of water treatment tablets and understood how and what type to use. Go ahead, there should be nothing else that will hold you back in using your humidifiers at home.

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