Best Remineralization Filter [Alkaline Filter Cartridges]

The best alkaline filter cartridge would depend on your specific needs and preferences.

However, some factors to consider when choosing an alkaline filter cartridge include:

  • Quality of the filter: Look for a filter that is made of high-quality materials and is designed to remove impurities effectively.
  • Alkaline level: Check the pH level of the water after passing through the filter. Ideally, you want a filter that increases the alkalinity to a safe and healthy level, between pH 7.5 and 9.5.
  • Longevity: Consider the lifespan of the filter cartridge and the replacement cost.
  • Compatibility: Make sure that the filter cartridge is compatible with your water filter system.

Here we’ve rounded up the 10 best remineralization filter cartridges [alkaline filter] that we found the most convincing in terms of quality and effectiveness in adding back minerals into RO water.

Remineralization Filter CartridgeSpecs
iSpring FA153-lay mineralization filter cartridge
Aquasana AQ-RO3-RMRaise the pH to near 7.0
HIKINS 10” PH+Improve the pH level to around 7.5 to 8.5
Reverse Osmosis Revolution Mineral57Adds other mineral elements
APEC FI-PHPLUS-QCIncrease the pH value up to around 7.0 to 7.5
Water Filter TecFeatures 5 different media
Geekpure C-R05-MFFit any standard under-sink RO system
Express Water FLTALKQ10Utilizes 5 stages of mineralization

8 Best Remineralization Filter Cartridges

Remineralization filters are no doubt one of the most reliable and convenient ways of remineralizing RO water and

If you thinking of investing in an alkaline filter to enhance the pH of your water, then these 8 Remineralization Filters are worth checking out.

iSpring FA15 Remineralization Filter

iSpring FA15 Remineralization Filter

iSpring FA15 is a high-quality inline Remineralization 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 makes 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 courses.

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.

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 best-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 flow may 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 which helps balance the pH levels of the RO water.

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

Installing the Aquasana AQ-RO3-RM is also pretty straightforward. It features a unique compression fitting that 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.  



HIKINS is a reputable high-tech manufacturer of water filtration systems and air purifiers. Their PH+ alkaline filter is one of the best models in the market and this is attributed to its efficiency with regard 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 Remineralization Filter adds back calcium, potassium, magnesium, and potassium ions into the water which was 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.

Reverse Osmosis Revolution Mineral57

Reverse Osmosis Revolution Mineral57

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 Remineralization 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 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.



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 raises 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 Remineralization 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 changing 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.

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 into 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 is 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 narrows the molecular beams. All these account for numerous benefits you will get from drinking the water remineralized by this alkaline filter which includes detoxification, reducing the 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 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 the 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 than 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 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.

Geekpure C-R05-MF Remineralization Filter

Geekpure C-R05-MF Remineralization Filter

The sixth spot in our list is taken by the Geekpure C-RO5-MF mineral filter. This is a pretty decent alkaline filter that’s built nothing but what 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-impregnated zeolite stones, and coral sands which contain all the original minerals that are necessary to make the water taste better and have a 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 extended filter with a diameter measuring 2 inches, so it’s designed to fit any standard under-sink RO system. It has a ¼” NPT inlet/outlet thread and can give you service for up to 6 months.

Express Water FLTALKQ10

Express Water FLTALKQ10

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 systems. You will need to get an installation kit including the fittings and brackets.

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

best alkaline minerals water filter cartridge - best Remineralization Filter

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