Mineral Pool Systems Guide

As a swimming pool owner, you know that there are some tricks to keeping your pool sanitized, clean, and clear. One of the things you may have heard is that you can use a mineral system to sanitize your swimming pool water, and ditch your chemical sanitizers like chlorine.

If you’re thinking about a mineral pool system to act as the sanitizer for your pool, you should make sure that you know everything about them to determine if it’s a good fit for you and your pool.

Depending on your skill level and how much time and energy you want to invest in its maintenance, a swimming pool mineral system might not be the best choice. But, if you are willing to put in the effort to learn how a mineral system works and effectively maintain the water and your system, you can achieve spectacular results.

What Is a Pool Mineral System?

A pool mineral system is an alternative sanitizing method for swimming pools. The concept is that you can take advantage of the anti-bacterial properties of silver and copper’s natural ability to kill algae to sanitize the water in your pool. By doing so, you may be able to avoid spending large sums of money on other sanitizing chemicals.

And, one of the most significant benefits of using a mineral sanitizer is that although you will need to maintain some sanitizing chemicals in the water, you shouldn’t ever have to deal with the effects of high chlorine levels. Saying goodbye to the harsh smell of chlorine is enough for many pool owners to consider making the switch to a mineral system.

Pros and Cons of Pool Mineral Systems

Mineral pool systems have their ups and downs. Let’s look at some of the pros and cons of operating one on your swimming pool.


Mineral sanitizers have some advantages, including being natural and helping reduce the need for sanitizing chemicals.

Helps Reduce Need for Sanitizing Chemicals

Mineral systems can minimize the amount of harsh sanitizing chemicals that you need to keep your water safe for swimming. When they are operating correctly, you can expect to need only a small amount of a sanitizing chemical as a supplement.


The process of sanitizing water with silver or copper is not a new concept. In fact, the Romans used silver as a sanitizer thousands of years ago, and they didn’t know it, but their copper-lined aqueducts helped prevent algae from growing as well. Instead of large amounts of bromine or chlorine killing organics in the water, you will be using a mineral system to take advantage of a natural sanitizing process.

Cartridges Last

Sanitizing system cartridges tend to last for months. So, you don’t have to worry about refilling chemicals or replacing them for a long time. If you have a sanitizing dispenser that automatically injects a bit of a sanitizing chemical in the water, it’s possible to go weeks without having to touch anything. You will have to maintain your water’s chemistry, so you still have to test your water about every week.


There are a few downsides to mineral systems. You should be aware of them before you invest in a mineral-based sanitizer system.

Potentially Costly

Mineral systems can seem inexpensive to set up. A complete inline kit with a cartridge will probably run less than $250. But, the hidden costs of sequestrants, non-chlorine shock, and potentially needing to change your water due to excessive levels of chlorine stabilizer or metal buildup can catch you off guard.

You Still Need Chemicals

Even the best mineral sanitizers will need a supplemental chemical to help. Mineral systems take too long to kill algae effectively on their own, so you will still need to maintain an adequate level of either bromine or chlorine.

Oxidation Risks

Metal buildup usually means copper. And where there is copper, there will be oxidation, just like on the Statue of Liberty. So, you need to keep copper levels in check. Otherwise, that same green color will begin to tarnish your pool.

Are Mineral Systems Safe?

The short answer is yes. Mineral systems are safe to operate. And, it is an excellent benefit not to need as much chlorine.

Opening up a container of chlorine and working with it to sanitize your pool can be unpleasant. It has a strong odor and can burn you when you get it on your skin. It is somewhat dangerous to mess with large amounts of chlorine, and when you’re working with it, you want to protect your eyes, skin, and clothes from exposure.

Types of Pool Mineral Systems

Pool mineral systems come in a few different configurations. Some are very simple, and others are a bit more complicated. Let’s look at the three most common setups.


A drop-in mineral system drops right into your skimmer or pump basket. Your pump’s suction will draw the pool’s water through the drop-in basket, exposing the water to the mineral cartridge stored inside the basket. Periodically, you will have to replenish the minerals. Most drop-in models are pretty easy to refill using a replacement cartridge from the manufacturer. Pool RX is a good option here.

Pool RX 101066 6 Month Algaecide Treats 20k-30k gallons, Black
  • Simply place in pump basket or skimmer basket
  • Eliminates all types of Algae
  • Reduces Chemicals
  • Effective for up to 6 months
  • Simplifies Pool and Spa Care


A floating system works just as you might suspect. Like the ubiquitous blue and white chlorine dispensers we know and love, a buoyant floater contains a cartridge with your sanitizing minerals. Most floating mineral systems also have a separate compartment for a chlorine tablet to supplement the minerals.

Floating mineral pool systems are more common with smaller-sized pools or spas. They also tend to be used more often with above-ground pools. They can float freely, or you can tether them in place to make sure they’re always in the stream of your skimmer’s suction or the jet from your returns. However, if your floater sits in the same place for too long and is too close to your liner or other non-color fast features, it’s possible that the chlorine could stain things.

There are a lot of options to choose from here, but FROG makes a pretty good floating dispenser.

King Technology Flippin' Frog Pool Sanitizer and Chlorine Dispenser
  • Easy to Use - Simply place the Flippin' FROG cartridge in your pool and let it go to work. Once the sanitizer flips over, easily replace the chlorine...
  • Long Lasting - With the mineral cartridge lasting up to six months and the chlorine cartridge lasting two to four weeks, the minerals reduce your use...
  • Replacement Chlorine Cartridge - Simply place the Flippin' FROG cartridge in your pool and let it go to work. Once the sanitizer flips over, easily...


An inline mineral sanitizer is part of the plumbing of your pool. It is a bit more work to set up than a drop-in or floating system. But, a DIYer who is comfortable with simple PVC repairs can install one with ease.

You don’t have to necessarily remove any other components either. Since mineral systems will periodically require supplementation from chemical sanitizers, you should probably leave any sanitizing equipment in place.

Your inline system will likely have a cartridge that needs to be changed periodically. If you’re interested in these models, check out Nature2 who makes a good inline system.

Nature2 Express Mineral Pool Sanitizer
  • Fits most in-ground and above-ground pools up to 25,000 gallons with 1 ½"" or 2"" rigid PVC pipe plumbing.
  • Easy, do-it-yourself installation. Everything in one box.
  • Cartridge lasts up to six months.
  • Reduces chlorine use up to 50%.
  • Controls algae and bacteria..Decreases pool maintenance..A better swimming experience, guaranteed.

How to Use and Maintain a Pool Mineral System

To use a mineral system to sanitize your pool, you will need to reduce the chlorine or bromine levels in your pool. For the minerals to work properly, you will need your chlorine to be less than .5 parts per million (PPM). And, if you use bromine instead of chlorine, you should let it drop to a reading of 1 PPM.

Mineral pool systems introduce metal to your pool’s water by design. You have to be very careful not to create issues by letting metal levels creep up too high. Copper, in particular, is a nuisance in pool water when it reaches a certain level. It can cause severe staining if left unchecked.

Therefore, make sure to test your pool water for all dissolved metals. If any readings are too high, you will need to use a sequestrant to keep them in check.

One of the reasons that there are so many problems with copper is that plumbing in our homes has copper pipes, and we often use our plumbing system to refill our pool. And swimming pool heaters often have copper components too. So, if they are beginning to break down, they will deposit copper into your pool water.

It is also absolutely imperative to keep your pool water balanced. Your calcium hardness, pH, and total alkalinity readings should match the recommendations from your mineral system manufacturer.

Typical pools have the following readings for optimal balance. But, you should always follow the manufacturer’s recommendations. And, when in doubt, we have some helpful guides like my walkthrough on swimming pool chemistry.

  • Calcium hardness: 225-275 PPM (concrete/plaster), 175-225 PPM (vinyl, fiberglass, etc.)
  • pH: 7.5
  • Total alkalinity: 125 PPM

Now that you have your water balanced, your chlorine or bromine levels are right, and you have ensured that there aren’t excess metals in your water, you are ready to add your minerals and start sanitizing. Once they’re in, you should either write down the date or set a reminder on your schedule to change the cartridge at the appropriate time.

The last step is to add a supplemental dose of either chlorine or bromine. Just make sure to maintain the levels specified for optimum performance of your mineral system.

How to Shock a Pool Mineral System

In order to shock a pool mineral system, you need to be wary of the chlorine level getting too high. To sanitize the water without disrupting the mineral system, you will probably need to use a non-chlorine product to avoid raising your chlorine level. Non-chlorine products are available in granules, just like regular chlorine.

Keep in mind that in order to effectively kill an algae bloom, you will need to ensure that the combination of your mineral system, your chlorine or bromine, and your non-chlorine product work together to completely sanitize the water for at least 24 hours. Otherwise, harmful bacteria or other organisms, like algae, will still be alive in the water.

It can be pretty difficult to find the right balance between the chemicals and the mineral system.

Sometimes, it may be more effective to remove your mineral cartridge, shock the pool using chemical sanitizers, and reinstall it after your water is completely sanitized and the chlorine or bromine levels have dropped low enough for it to work.

Don’t forget to ensure that the water is balanced and that you don’t have too many dissolved metals in the water.

Bottom Line: Are Mineral Pools Worth It?

Mineral pool systems are nice in theory. But they can become a tremendous headache for a typical pool owner. It is very easy to get in way over your head, and I don’t mean swimming into the deep end.

The promises of a chlorine-free pool and a lower chemical bill rarely come true. The buildup of copper in your water from your mineral system will likely lead to you needing to eventually either change the water or add sequestrants to isolate the metal and keep it from bonding with or staining your pool. And, you will definitely still have to deal with chlorine or bromine.

On the other side of the coin, a mineral sanitizing system that is maintained carefully can yield spectacular results. And when your pool is relatively stable, it might actually be easier to use minerals to sanitize the water. But, if you have a lot of activity in your pool or it is subject to a lot of biotic debris or algae blooms, it is probably less than ideal.

Need Some Maintenance Help?

We partner with HomeAdvisor to help you find the best swimming pool maintenance and cleaning services in your area. Compare quotes for free from fully vetted pool professionals.

Whether you are hiring someone to maintain your pool or doing it yourself, a mineral pool system must regularly receive careful and conscientious maintenance.

Have questions? Drop me a line.

As an Amazon Associate, we earn from qualifying purchases. Participation in these programs helps us keep the lights on at PoolResearch.com and in no way impacts our research process or editorial opinions.

Scroll to Top