Best Water Softener Resin for Well Water

A well water softener resin helps to soften hard water by removing magnesium and calcium ions and replacing them with sodium ions. The process involves back-washing, recharge, and rinsing.

The resin is a plastic-like compound that plays an important role in all three steps of water softening. It’s capable of swapping one ion with another. There are two types of water softener resin available:- Fine mesh and Ion exchange.

Just a quick preview of how a salt-based water softener works. The salt you add to your softener is sodium chloride. When poured into water, it dissolves into two compounds:

A positively charged sodium atom and a negatively charged chloride atom. The resin bed will take the calcium ions and give up the sodium ion.

Eventually, the resin depletes all its sodium ions, so it must be replenished. This happens when your softener system is placed into backwash.

In the backwash stage, the water softener flushes out all the calcium ions to drain and then replenishes all sodium lost in the ion exchange process.

The backwash is then directed to a drain that carries the ions to the wastewater management facility or septic tank.

All conventional cation water softener resin beads are engineered to soften hard water. But before replacing your water softener, you should ensure a few things, such as what kind of media you have inside your water softener. In addition, there is also how much media is contained in your mineral tank.

In case you are looking into buying a water softener resin, you will want to look into a resin that is specifically made for your type of water hardness.

If you have an iron water problem in your water, you should get an iron filtration system made precisely for your type of iron.

Dissolved iron could be reduced to as much as 6 mg/ltr through softening. A Fine mesh resin is most notably the best in removing iron from well water.

For tannin (produced by rotting vegetation), you can find anion resin that may well clean out tannin from consuming water.

In cases where you have a high chlorine concentration, the process is a lot more difficult for any water softener resin. If you want the chlorine removed, get a backwash carbon filter with a few cu. Ft. of carbon.

To deal with crappy well water, we have compiled a list of the most effective water softener resins. Most of these ion exchange resins are generally made with a typical particle dimension of around 0.5 millimeters. So let’s take a closer look at each of them.

5 Best Water Softener Resin for Well Water in 2022

1. AFW filters High Capacity Resin for Water Softener (8% Crosslink 1/2 cubic foot)

High capacity is a conventional gel polystyrene sulfonate cation exchange resin made for big tank sizes. The particles are a high-quality cation exchange resin with a structure of 8% crosslink ½ cubic foot styrene cross-linkage replacement resin.

While the hard water passes through the resin, the calcium and magnesium ions are removed and replaced with the sodium ions in the system.

This process repeats itself, but it won’t last forever. With an average resin life span of 10-20 yrs., the resin bed will be exhausted, and you will need to be replaced before the hardness ions begin to a breakthrough in the effluent.

Throughout this routine, the resin should be rewashed with a salt solution. The water softener resin needs to be regenerated or rinsed to allow it to keep its capabilities.

If you choose a cleaning substance for that purpose, make sure it is perfect for removing mineral buildup. Usually, you can find a resin cleaner targeted at a definite element – for example, manganese and/or iron.

You are also assured of a quality product with this resin because it has been tested and certified by NSF and FDA.


  • Value for money.
  • Ready for use anywhere.
  • Affordable.
  • NSF and FDA approved.
  • Durable.


  • More costly.

2. Purolite C-100-e Cation Exchange Resin For Water Softener ( 1Cubic Foot)

Purolite is another common cation resin that can also clean out iron that is often widespread in many private wells across the country.

It’s a 1 Cubic Foot, US-made resin that can be used with many models. It’s another approved FDA product that is a top-value water softener resin.

The resin captures the magnesium and calcium and replaces them with sodium and hydrogen ions through a standard softening process.

Its function is to saturate the water with the ions that cause hardness. The second stage is recharge which involves the transfer of brine solution from its tank and into the mineral tank.

In this phase, resin works by trapping sodium ions from the brine solution. The trapped ions in the second phase become useful during the third stage.

This water softener resin may also get clogged, leading to a system’s performance loss. This requires significantly more regeneration while using the same amount of salt, which will cause an increase in salt usage.

A resin cleaner is generally applied in the equipment to exchange the minerals for salt ions to take the magnesium and calcium minerals out of the resin beads.


  • Made in the USA.
  • FDA approved.
  • Safe for drinking and cooking.
  • Compatible with many water softeners.
  • Value for money.


  • Strong smell.

3. Indion Water Softener Ion-exchange Resin 8% Cross-linked ( 1 Cubic Foot)

Indion is a newly developed resin with a very stable polymer structure consisting of styrene crosslinked with 8% DVB.

The structure is made of strongly acidic sulfonated polystyrene held together by styrene cross-linkage. It captures elements such as magnesium, calcium, and other minerals through ion exchange.

The Indion water softener resin is ideal for water softening. NSF (National Sanitary Foundation) / ANSI (American National Standards Institute) 61 standards for the treatment of drinking water for human consumption are approved.

Removing the hard water-causing elements will transform the water into softer, better-quality water. However, this resin does not remove the carbonates.

You’ll also love the fact that it’s a DIY product that you can install without paying installation costs. Having been tested and certified by NSF / ANSI 61, it is safe for drinking and cooking without any health concerns.

If properly handled, preferably stored in a cool place, and not allowed to dry completely, it can prove to be the best bang for the buck favorite. This is because of its 100% effectiveness and longevity, lasting for 10, 20, or more years.

This is also a low-budget resin that can be the perfect replacement for your old resin bed. To wrap up, we’re advised it’s suitable for any residential water softener.


  • Value for money.
  • Budget-friendly.
  • Easy to install.
  • Food resin grade replacement.
  • Efficient regeneration and great kinetic performance.
  • Treat hard water efficiently.


  • Quality control issues.

4. Water Softening Resins ½ Cubic Fit Bag Replacement Softener

The Water Softening Resins is a must-have if you experience hard water problems. The resin is a high-capacity replacement water softener with an 8% crosslink resin.

It’s a 1/2 cubic foot bag designed to give a total of 6,500 grains or 111,150 ppm removal of soluble TDS capacity. It’s among the most reliable alternatives to the many resins on the market today.

The package weighs 28.0 pounds and is also a polystyrene sulfonate cation exchange that can be used for residential and commercial purposes.

The resin can remove the hardness brought about by iron, calcium, and magnesium from the water, switching them with sodium ions. Thus saving your tubs and sinks from staining and pipes from clogging.

It has a lot of positive reviews thanks to its reasonable price and effective water softening capabilities.


  • Reduces limescale and mineral buildup.
  • Suitable for industrial and commercial use.
  • Removes calcium and iron.
  • It has an 8% cross-link.
  • Budget-friendly.


  • Longevity depends on your water source.

5. Mobile H2o 12.5 Pounds Msw0618-m-8000-w ¼ Cubic Foot 8000 Grain (Virgin) Water Softener Resin On The Go Softeners

This water softener resin should be on your bucket list if you own an RV. The mobile water softener resin cation exchange from hydro technology systems on the go is a 1/4 cubic foot bag designed to provide 8000 grains or 55,575 ppm removal of soluble TDS capacity.

That’s why many happy RV users are happy with the product. The water softening resin complies with the U.S. food and drug administration standards for use in food treatment.

The resin gives you water of high quality and allows you to save money too. You don’t have to worry about adjusting since your water system has a mineral build-up of scale that doesn’t need replacing.

With a superior resin, as you don’t have to worry about water stains or unflattering rust irons, you get softer, smoother skin, and there is no metallic aftertaste in the water.

This product is ¼ Cubic Foot or 12.5 pounds of softener media. A portable water softener is ideal for RVs since they are easy to install and fits well.


  • Perfect for RVs.
  • Suitable for residential, commercial, and industrial.
  • 8% cross-link water softener.
  • Hardness removal.
  • Impressive with all U.S.
  • Good value for your money.


  • Not ideal for larger households.

Final Verdict

AFW filters High Capacity Resin for Water Softener (8% Crosslink 1/2 cubic foot)

As mentioned, The AFW is a high-quality conventional gel polystyrene sulfonate cation exchange resin whose structure is made of a strongly acidic sulfonated polystyrene held together by 8% crosslink ½ cubic foot styrene cross-linkage replacement resin.

This is our choice for the most effective water softener resin because;

  1. The quantity of resin is perfect for 10″ x 54″ or 48,000 grain tanks.
  2. The water softening resin has been approved by the NSF (National Sanitary Foundation) / ANSI (American National Standards Institute) 61 standards for the treatment of drinking water for human consumption approved.
  3. Besides having high exchange and mechanical strength, it has good hydraulic properties as well.
  4. It exhibits excellent kinetic behavior along with excellent physical, chemical, and thermal stability.
  5. Besides softening hard water and preparing high purity water, it is also used for the separation and purification of trace elements. It is also used for use in hydrometallurgy and pharmaceuticals.
  6. Made for big tank sizes.
  7. An average resin life span of 10-20 yrs.


If you answer yes to any of the following you can be fairly certain that the water flowing into your home is hard water:

  • You buy expensive soaps and detergents that other people rave about. However, your clothes still never seem clean after being washed and you still feel sticky when you get out of the shower.
  • However many times you rinse, you still have filmy glassware. Even with the best dish-washing liquid, your glasses often smell like sulfur.
  • Your water is unpleasant tasting.
  • Your household appliances do not seem to last as long as other people’s.

In that regard, we recommend you buy yourself a salt-based water softener. This is the most effective solution available for eliminating the effects of hard water in the home.

Removing calcium and magnesium from the water will prolong the life of appliances, improve the efficiency of detergents and cleaning products, and protect the pipes from scale buildup.

These effects save homeowners money by reducing the amount of detergent that needs to be bought and by prolonging the life of the appliances.

In general, the water softener can pay for itself in five to seven years despite the initial high installation cost. Although there are cheaper salt-free alternatives available, they rarely provide the kind of satisfactory results or cost savings that a salt-based system offers.