Reverse Osmosis Water [pH Remineralization & The Benefits]

In this post, we will take an in-depth look at everything to do with reverse osmosis water and ph remineralization and give you a list of the top 8 mineral filters for RO systems that are worth considering.

Here you will find:

Once you are done going through this article, you will have a great insight on how to remineralize your RO water and what type of mineral filter to get.

So, without further ado, let’s get started.

What is reverse osmosis water?

Reverse osmosis water (or RO water) is purified water that has undergone filtration through a reverse osmosis system to remove impurities, contaminants and other substances like minerals. The water is completely clean and it’s ideal for drinking.

reverse osmosis water ph remineralizing

What is reverse osmosis water remineralizing?

RO water remineralizing is the process of adding back some of the minerals that were stripped off from the water after going through the RO filtration process so as to balance the pH level of the RO water and to enhance its mineral content.

There several various ways of remineralizing RO water and it can be done at the source without having to replace your whole RO system by adding an extra filter or afterward when you draw the water from the faucet.

However, how much minerals will be added back in the water will depend on various factors such as the existing pH level of your RO water, the flow rate, water temperature and the method you choose to use to remineralize your RO water.

Why do we need RO water remineralization?

Reverse osmosis provides an effective and reliable way of purifying water and while it eliminates all contaminants and unhealthy substances, it as well strips out all the mineral content present in water.

The only way to circumvent this is remineralizing the RO water to get the essential minerals that the body needs and still enjoy contaminant-free water.  If you are wondering how to go about it, then we got you covered.

The pH of RO water

The pH of RO water is basically a measure of its acidity. Liquids that have a pH level of 7.0 are considered neutral while anything above that is alkaline and anything below is considered acidic.

In general, the reverse osmosis filtration process removes almost all the minerals present in the water alongside other contaminants.

The resultant RO water is much pure and as such, it tends to naturally grab a lot more CO2 from the air which ends up making it acidic when they bond together. This results in the lowering of the alkaline of RO water or rather the pH of the RO water.

It often drops below 7.0 ranging from 5.0 to 6.0 which is acidic but much less compared to the acids in our stomachs which are naturally low, around 2.0.

Therefore, drinking RO water will certainly not have any effects on your body as your stomach is much more acidic than the RO water you are drinking, so it’s not likely to be affected by the consumption.

The only thing is that the resultant water may taste unpleasant to some people. It may have a crisp taste, while some would say it tastes metallic.

It will also not have the essential minerals found in mineralized water.

Ideal pH Levels for Drinking Water and RO Water

Water with a pH value of less than 5 is considered to be more acidic and often contaminated with pollutants which makes it unsafe to drink. It can be corrosive (can corrode metal pipes) and filled with toxic metals.

On the other hand, water with a pH value that’s higher than 8.5 is considered very alkaline and both its taste and smell can be unpleasant. It can also leave scale deposits on sinks and dishes. However, it poses less health risk compared to acidic water

Therefore, the ideal pH levels of both drinking water and RO water should be around 6.5 to 8.0, preferably 7.4. Water with a pH value that’s within this range is safe to drink as it’s neither too acidic nor too alkaline hence not likely to pose any danger in the human body.

How to Remineralize RO Water

There are a few different ways you can remineralize your RO water and isn’t difficult at all as long as you have the right supplies.

Below are 5 easy ways for remineralizing RO water.

Adding an Alkaline or Re-mineralization Filter to an RO System

One of the best and very effective ways of increasing the pH value of your RO water to ideal levels is by adding an alkaline filter to your RO system.

This alkaline filter is added after the RO filtration process or rather post purification, after the post-carbon filter or the UV filter, just before the RO water enters the storage tank.

It’s basically a filter-like attachment containing food-grade minerals. Once the water is purified and passes over the alkaline filter, some of the minerals that were stripped dissolve back into the water which helps to bring its pH to a more balanced level.

It’s worth noting that the water temperature, the flow rate, and the existing pH of the feed water will affect how much minerals get to be added back into the water.

Most RO systems nowadays actually include an alkalization stage which consists of a remineralization filter.

However, if your system doesn’t feature this stage, then you can easily add one without much hassle or having to replace the whole system.

These filters typically can last from 6 to about 12 months before requiring replacement but this depend on the pH of your feed water as well as your water demand.

Adding Electrolyte Blends or Trace Mineral Drops to RO Water

Adding electrolyte blends otherwise known as trace mineral drops is yet another easier solution to remineralizing RO water.

The electrolyte blends are compositions of several types of minerals which include calcium, copper, magnesium, iron, manganese, and selenium.

You simply need to add a few drops of the blends into your RO water after drawing it from your RO faucet and they will instantly raise the alkalinity of your water

They typically provide a quick and easy way to remineralize the RO water and you can add them to any quantity of water.

Furthermore, most of these mineral drops and blends aren’t too expensive plus you can easily get them from most well-sorted supermarkets or medical stores.

One thing you should note though is that the blends tend to differ in composition. Some brands may have a higher, more balanced or different mineral composition than others.

Therefore, you will need to do some research to ensure you get the right kind of electrolyte blends or mineral drops. You will also have to make sure you read and follow the instructions regarding the dosage and amount of drops to add to water to get the right results.

Adding Mineral Rich Salt to RO Water

Mineral-rich salt is as well a very cost-effective and easy method of remineralizing an RO water. This basically involves using a special type of sea-salt that’s very dense in minerals, not just any random salt.

One of the best and well-known option is Himalayan sea salt. It’s the most widely used mineral-rich salt and this is because it’s not only inexpensive but also works effectively as other methods.

This salt is packed with over 60 different trace elements which are sufficient to remineralize RO water. You simply need to add a tiny pinch of the salt to every glass of your RO water to remineralize it.

For an entire gallon of RO water, you will need to add about a quarter of a teaspoon.  There won’t be any significant change in the taste of the water. It will pretty much taste like any drinking water. It won’t taste salty.

Again, you should note that you cannot use processed salt including table salt because they consist of almost only sodium and chloride which won’t do the job of adding minerals to your RO water. Only mineral-rich salt like the Himalayan sea salt will work effectively.

Using an Alkaline Water Filter Pitcher

Using an alkaline water filter pitcher is equally an effective way of remineralizing RO water. An alkaline water filter pitcher is basically a container made up of filters. It stores your RO water while automatically adding beneficial minerals into it and raising its pH level.

The best part about these pitchers is that most of them are designed to re-filter the water first before adding the minerals back into it. These minerals include magnesium, calcium and other kinds of mineral elements that ultimately help balance the PH levels.

You can easily find several different kinds of alkaline pitchers on the market or even at specialty stores and a good example is the Kent alkaline water filter pitcher. However, pitchers are a bit more expensive compared to using electrolyte blends or mineral-rich salts.

The advantage though is that they tend to last longer than the other two methods. Therefore, with a budget or some little more money to spare, an alkaline water pitcher is a good buy.

Using Green Blends

Last but definitely not the least, you can remineralize your RO water by using green blends which are basically extracted minerals derived from vegetables, herbs, grasses, and other plants.

These blends are packed with minerals as well as fiber and essential vitamins and nutrients. In short, they contain quite a wide range of balanced minerals that offer an all-round solution with regards to remineralizing RO water.

The downside though is that like alkaline water filter pitchers, green blends are fairly expensive compared to the other methods. This is because they have to be extracted from the vegetables and made in powder form which tends to be costly.

As such, they may not be an ideal option, especially if you working with a tight budget and you are seeking a long-term solution. They also tend to make the water taste somewhat different than normal drinking water which not everybody may actually like.

On the upside, however, green blends offer another great alternative to restoring back the lost minerals into your RO water.

They are a quick, all-encompassing method that will certainly give additional health benefits due to the extra fiber, vitamins, and nutrients they contain.

Overall, all these methods are effective when it comes to remineralizing RO water but if we are to pick a much conducive, sustainable and long-lasting solution, then it would be adding an alkaline filter to your RO system. It provides a hassle-free and all-encompassing answer.

What are the Benefits of Remineralizing RO Water?

As we’ve mentioned earlier, by remineralizing your RO water, you get to enhance its mineral content which can give you several health benefits. Below are just some of these benefits you can get from remineralizing your RO water.

Helps to Balance the pH level of Your Body

Your body generally tries to naturally maintain a balanced pH level regularly but when it’s too acidic, your system will have to work a little extra hard in order to keep the pH levels balanced.

Moreover, when the body is too acidic, it as well tends to interfere with the normal functioning of your body cells which makes you more vulnerable to diseases.

Therefore, drinking remineralized RO water will help will certainly help you maintain a balanced pH level in your body as well as avoid diseases.

Furthermore, your body is more capable of absorbing the minerals quicker from the water than from food consumption which makes remineralizing your RO water a nice way of keeping the mineral and electrolyte balance.

Helps in Detoxification and Improving the Immune System

Another key benefit of drinking remineralized RO water is detoxification. The alkaline RO water helps to naturally neutralize the free radicals and flushing out toxins from your body that may cause a number of health problems.

It basically detoxifies your body by cleansing the toxins which significantly boost your immune system making your body more efficient. In addition, the water also helps to raise the pH of your urine and as such it improves your kidney function in terms of detoxifying the body.

Helps to Lower Blood Pressure

Aside from helping in detoxification and boosting the immune system, remineralized RO water can as well help lower blood pressure.

Low levels of magnesium in the body can contribute to high blood pressure. It may also lead to congestive heart failure as well as conditions that are likely to cause irregular heartbeats.

Remineralized RO water can be a good source of magnesium which is the nutrient that plays an important role in regulating blood pressure, nerve function and blood glucose levels. It helps reduce the risk of cardiovascular disease.

On top of that, having enough magnesium in the RO water can also assist in preventing constipation and as well in improving the health of your digestive system.

Magnesium generally helps draw water into the intestines which in turn improves stool consistency. Furthermore, it relaxes the intestinal muscles hence supporting regular bowel movements.

Promotes Blood Circulation and Strengthens Bones

Remineralized RO water may have a good amount of calcium, potassium, and magnesium, all of which are nutrients that promote blood circulation.

Calcium in particular which is one of the minerals that’s often added back into RO water is essential for building and as well maintain strong bones.

It helps increase the strength of your bones and muscles. This nutrient can also assist in regulating the rate plus rhythm of your heartbeat aside from promoting bone strength.

Helps Lose Weight

One of the other benefits of drinking remineralized RO water regularly is that it can help you lose weight. Unhealthy junk food often causes a significant increase in acidity in the body.

Therefore, to neutralize this acidity, the body tends to produce more fat cells which results in weight gain. As such, drinking remineralized RO water on a daily basis can neutralize the acidity in your body thereby help you avoid weight gain.

Offers Better Hydration

Studies have shown that enhancing the mineral content of your RO water or rather drinking alkaline water can provide better hydration than when drinking plain water.

RO water typically allows for much better hydration capacity than plan water. In other words, if you suffer from chronic dehydration, then drinking remineralized RO water can certainly be of great help addressing this problem and staying healthy.


What is the pH level of reverse osmosis water

The pH level of water produced by a reverse osmosis system ranges from 5.00 to 6.00. The reason for this is that the system removes most of the buffering alkalinity. However, the acidity in RO water tends to be very weak which makes it not much of concern. Plus a re-mineralization filter can help improve the pH to a neutral point which ideally 7.00.

Is reverse osmosis water safe to drink?

Yes, it is. Reverse osmosis water (RO water) is safe to drink as the RO system removes up to 98% of lead and contaminants from water and frees people from many diseases such as high blood pressure, nerve damage and low fertility.

Is reverse osmosis water distilled?

No, it isn’t. RO water is the result of the reverse osmosis process that uses an external pressure (water pressure) to force the water to overcome the osmosis flow through the RO membrane while the distilled water is water that has been boiled into vapor and condensed back into liquid in a separate container.

Is reverse osmosis the same as distilled water?

No, they are different. For example, a water distiller does not remove chlorine and other chemicals completely from water while an RO system does.

Is reverse osmosis water safe for neti pots

In theory, the answer is Yes as the RO water is clean enough, but if you choose to make your own saltwater for neti pots, distilled or sterilized water is recommended, so you better follow the instruction.

Is RO water acidic?

Yes, it is. The pH level in RO water often drops below 7.0 ranging from 5.0 to 6.0 and it is considered acidic.

Is RO water bad for you?

No, it isn’t. Even RO water is acidic and lacks some minerals that good for your health, the RO water is not bad for you as you can have the minerals from your food and the pH level of RO water is about 5-6 is still higher than the pH level in your stomach which is about 2.

Is reverse osmosis water alkaline?

No, it isn’t, RO water is considered acidic as the pH level drop below 7 in the range of 5-6.

How to Remineralize RO Water?

There are 4 common ways to remineralize RO water includes Adding an Alkaline or Re-mineralization Filter to an RO System, Adding Electrolyte Blends or Trace Mineral Drops, Adding Mineral Rich Salt, Using an Alkaline Water Filter Pitcher, Using Green Blends.

Top 8 Mineral Filters for RO System

Mineral filters are no doubt one of the most reliable and convenient ways of remineralizing RO water and here we’ve rounded up the top 8 mineral filters that we found the most convincing in terms of quality and effectiveness in adding back minerals into RO water.

If you thinking of investing in a mineral filter to enhance the pH of your water, then these 8 filters are worth checking out.

1. iSpring FA15 Alkaline Water Filter

iSpring FA15 Alkaline Water Filter

iSpring FA15 is a high-quality inline alkaline water filter and it comes in two versions, a new upgraded version, and an older version.

In this review, we look at the new iSpring FA15 version which comes with a few upgrades that make it much better than its older version and most other alkaline water filters in the market today.

The first thing that makes this upgraded iSpring FA15 model stand out is the set of media that it comes with. It’s a 3-lay mineralization filter cartridge made up of red mineral stone, calcite and corosex.

The purified RO water first goes through the mineral stone side (red), then moves through the calcite media side (white/clear) where it exits towards the RO faucet.

As the RO water passes through the filter, the three media restore back the lost minerals which include calcium, potassium, magnesium and sodium ions which in turn improve the pH level of the RO water.

The filter is capable of raising the pH level by 0.5 to 1.2 which makes it quite effective for use in areas where the source water has a very low pH level.

All the media and material used in making this iSpring FA15 filter are all-natural and FDA grade hence they are not only safe. They will leave no residues behind or further contaminate the water as the synthetic alkaline filters do.

The updated FA15 alkaline filter can work with any under-sink RO system. Unlike the older version, this one features a very secure push-fit quick connection for quick installation or replacement at the end of your RO system as the last stage.

You just need to screw the push-in connector on each end then attach a ¼” water tube on both sides. However, the flow direction arrow is not that well labeled like in the older FA15 alkaline filter but it can be installed in either direction.

The filter does not affect the normal flow rate of water and considering that it’s an inline filter, you won’t need to buy housing. It can last from 6 to 8 months depending on the pH level of your RO water.

2. Aquasana AQ-RO3-RM Remineralizer Filter

Aquasana AQ-RO3-RM Remineralizer Filter

In the second position, we have the Aquasana AQ-RO3-RM which is another quality remineralizing filter that’s built to effectively restore back minerals stripped from water by the RO filtration process.

This remineralizing cartridge is made out of ground limestone and flowmag which are the media responsible for adding the lost minerals back into RO water as it passes through it.

The filter is capable of putting back healthy amounts of magnesium, calcium, and potassium into purified water, a mixture that helps balance the pH levels of the RO water.

It can raise the pH to near 7.0 which is an ideal level that ensures healthy drinking water that tastes much better than the pure RO water.

Installing the Aquasana AQ-RO3-RM is also pretty straightforward. It features a unique compression fitting which allows you to easily hook it directly in line after the post-filter in the RO system. 

It uses 3/8” tubing, so you will have to get a 3/8” to ¼” reducer if your system uses a ¼” hose. The filter also offers a decent life service as it can last up to 1 year before requiring replacement.

The only unfortunate thing is that it’s not quite ideal for use with RO systems from other brands. It’s designed to work best with Aquasana RO systems.  

3. HIKINS 10” PH+ Alkaline Water Filter

HIKINS 10” PH+ Alkaline Water Filter

HIKINS is a reputable high-tech manufacturer of water filtration systems as well as air purifiers. Their PH+ alkaline filter is one of the best models in the market and this attributed to its efficiency with regards to remineralizing RO water.

This high-performance filter is made up of natural mineral stone and calcite media that restore back the essential minerals to pure water.

The filter adds back calcium, potassium, magnesium and potassium ions into the water which were removed while purifying the water.

This mineral mixture can improve the pH level of the RO water to around 7.5 to 8.5 which helps balance your water hence giving you a much healthier and safer home drinking water.

Another commendable thing about this HIKINS alkaline filter is that it’s designed to work with a wide range of systems. It’s fully compatible with any under sink RO system.

It can work with APEC, iSpring, Express Water and other systems. The installation is very simple and the package comes with two connector fittings alongside the alkaline filter.

In general, if you are looking for a universal alkaline filter that can work with any RO system, then the HIKINS PH+ alkaline filter is worth considering. It can last from 3 to 6 months based on the quality of your feed water.

4. Reverse Osmosis Revolution Mineral57 Alkaline Filter

Reverse Osmosis Revolution Mineral57 Alkaline Filter

The Reverse Osmosis Revolution Mineral57 is a well-rounded alkaline filter and one of the top models that offer a wide range of minerals aside from the common ones other alkaline filters add into RO water.

The filter is made from maifan stone balls which contain all the essential minerals that include calcium, potassium, magnesium, copper, sodium, and molybdenum.

Aside from these common minerals, the filter as well adds other mineral elements such as SIO2, FeO, MgO, Fe203, CaO, Na2O, k2O, MnO, p2O5, TiO2 and much more including other trace elements that are beneficial to the human body.

Therefore, the mineralized water produced after going through this Reverse Osmosis Revolution Mineral57 filter not only has substantial health benefits but also a well-balanced pH level.

It will certainly raise the pH value of your RO water to a good alkaline range and make it taste much better.

In addition to providing a wide variety of minerals, the maifan stone balls in this filter can also improve the biological activity of your RO water dissolved oxygen concentration.

It has a very strong adsorption ability and will effectively remove harmful heavy metal ions as well as toxins in the water resulting in a clean, safe and healthy drinking water that is rich in mineral content.

In terms of installation, the Mineral57 filter will present no challenge at all. It’s easy to install and it’s compatible with any standard RO system with ¼” tubing.

5. APEC FI-PHPLUS-QC Alkaline Filter

APEC FI-PHPLUS-QC Alkaline Filter

Following the Reverse Osmosis Revolution Mineral57 is the FI-PHPLUS-QC alkaline filter from APEC Water Systems. This 10-inch inline filter is purposely designed to raise the alkalinity of the RO water and as well make it safe to consume.

Made of only high purity calcium carbonate, the APEC FI-PHPLUS-QC filter effectively neutralizes the acidity in the RO water and raise its pH value to a more safe and healthy level. It can increase the pH value up to around 7.0 to 7.5.

The filter features quick connection fittings that make installation pretty easy. It uses ¼” quick connect only but you can also get a similar model that uses 3/8″ tubing.

Even much better, the APEC FI-PHPLUS-QC filter APEC has a friction-welded construction which uses no glues or binder hence providing a reliable, no-leak seal.

The filter will give you 1 year of service before change out. It’s certainly a great add on to any RO system for those looking to boost the mineral content and pH of their RO water.

6. Water Filter Tec Alkaline Filter

Water Filter Tec Alkaline Filter

This Water Filter Tec model is a fully packed alkaline water filter cartridge that features 5 different media that restore back all the essential minerals into the purified water after going through the reverse osmosis filtration process.

The Water Filter Tec filter offers the ultimate natural blend of ionically activated stones to turn pure water to good alkaline water.

It’s a five in one alkaline filter consisting of a mixture of alkaline calcite, bioceramic, tourmaline, mineral stone and ORP ball.

The first mineral stone, alkaline calcite is very effective at boosting the RO water pH to a higher level than regular alkaline filters. It can raise the pH from as low as 5.5 to 8 with only small contact.

The second one which bioceramic is based on Far-infrared rays that cause resonance with water molecules. It ionizes and activates the water molecules within the cells and blood thereby improving both your blood circulation and health condition.

The tourmaline stones are yet another precious stones that are included in this Water Filter Tec alkaline filter. It releases 0.06mAbiolectectricity into the RO water and generates negative ions.

It also electrolyzes the RO water as well as narrow the molecular beams. All these accounts for numerous benefits you will get from drinking the water remineralized by this alkaline filter which includes detoxification, reducing lactic acids, liver and kidney support, and toxic metal elimination.

The fourth minerals in the lineup are the mineral stones which equally aid in activating water molecules within the body cells and blood to improve the blood circulation.

ORP balls are the last media in this filter and they further help to clean the RO water by reducing its Oxidant Reduction Potential which not only helps to maintain healthy body cells but also boosts metabolism and immune system.

In short, the Water Filter Tec filter is one of the best alkaline filters out there that offers a perfect blend of natural alkaline contents.

It will effectively balance the pH of your RO water and on top of that add all the essential mineral supplements into it and make it much tastier water that your regular RO water. You also get an all-around, anti-oxidation effect and more oxygen than in normal RO water.

The installation has also been simplified for you as the filter comes with quick connect fittings plus filter clips that make connection it quick and easy.

It uses ¼” fittings, so you will need a 3/8” adapter if your system uses 3/8” tubes. Depending on the quality of your source water, it can give you a service life of around 6 to 12 months or 4000L.

7. Geekpure C-R05-MF Mineral Filter

Geekpure C-R05-MF Mineral Filter

The sixth spot in our list is taken by the Geekpure C-RO5-MF mineral filter. This a pretty decent alkaline filter that’s built nothing but the work is intended for which is to balance the pH level of the water and add back essential minerals.

The C-RO5-MF is made up of bio-stones, silver-pregnated zeolite stones and coral sands which contain all the original minerals that are necessary to make the water taste better and have good alkalinity level.

The filter adds back calcium, potassium, magnesium, and sodium ions into the pure RO water which helps raise its pH value to a much better level.

As for the installation, this is a 10-inch long filter with a diameter measuring 2 inches, so it’s designed to fit any standard under-sink RO system. It has ¼” NPT inlet/outlet thread and can give you service for up to 6 months.

8. Express Water FLTALKQ10 Alkaline Filter

Express Water FLTALKQ10 Alkaline Filter

If you are after an alkaline filter that offers a comprehensive blend of mineralization media and material, then this Express Water FLTALKQ10 is a great alternative.

The unit utilizes 5 stages of mineralization which consist of maifan stone, far infrared, calcite, alkaline, and mineral stone.

The alkaline rock raises the water’s alkalinity which helps neutralize acid and increase oxygen in the water. The calcite crystal is responsible for correcting the pH of the water and preventing metal absorption.

The far infrared adds zinc as well as other important trace elements into the water while the maifan stone restores back the ionically activated mineral content into your RO water which includes magnesium, calcium, dietary iron and potassium.

These minerals equally help improve the pH of your RO water, so you get maximum mineralization and alkalization.

The fact that the minerals are ionically activated allows the RO water to effectively pick up more mineral content from the stones just like how natural springs add minerals to the water.

Installing the Express Water FLTALKQ10 is completely a breeze because it will perfectly fit in any under-sink RO system. It’s a standard-sized filter that’s compatible with all quick connect system. You will need to get an installation kit including the fittings and brackets.

Based on your feed water quality, the filter can go up to 6 months, so it will give you the best value before replacement.


RO water on its own is not bad for consumption provided it’s not too acidic. However, remineralizing it offers many more benefits as it enhances the pH level of the RO water making it taste better than ordinary water.

More importantly, remineralizing RO water helps restore back the minerals stripped away by the RO filtration process and these minerals are quite beneficial to the health of our body.

As you’ve seen from our post above, there are various ways to remineralize your RO water. Alkaline filters by far offer the most effective and convenient way not only of raising the pH of the RO water but also of adding back the lost essential minerals.

Finding that quality alkaline filter that’s reliable and works efficiently is, however, the main stumbling. It may be quite a time consuming with all the dozens of brands offering a variety of different models to choose from.

Our top 8 recommendations above are quality filters that are more than capable of getting the job done pretty well. They are a good investment worth considering if you are looking to narrow down your search and find the ideal filter without much hustle.

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