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Mineral Sanitizers for Spas

Metallic ions can help reduce chlorine or bromine usage.
The Pool and Spa Informational Website or

Alternative Spa and Hot Tub Water Sanitizers.


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Using a Mineral Sanitizer, to help sanitize spa water!!!
Mineral sanitizers use an erosion process, as opposed to an electrical charge, by which metallic ions, such as copper, silver or zinc, are utilized to help sanitize spa and swim-spa water.  It is not a complete water treatment system, as it lacks the oxidizing function, required to oxidize organic wastes and byproducts.  Chlorine or bromine is typically used to provide the oxidizing function.  Salt Chlorine generators are a better way to utilize chlorine, producing more controllable results. They eliminate the need to handle, measure or store chlorine products, while reducing buildup problems.  An Electronic PockeTester Kit is a convenient way to monitor the salt level.
Salt Chlorine Generators - 4 Models Testing The Salt Level Salt Chlorine Generators - 4 Models
SmarterSpa Salt Chlorine Generator, with Chlorine Detection Technology. #1749 PockeTester Kit, for salt TDS and temperature. MegaChlor-CD salt chlorine generator, with Chlorine Detection Technology.
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If you have a pool or spa water testing need, we should have the product.
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A ColorQ 2X is a 2nd generation, Bluetooth, Waterproof, all-digital tester, that can measure all the common test factors. There is a model, for every sanitizing need.  An Automatic Filter Cartridge Cleaner simply attaches to a standard garden hose.  Three sizes, for all spa needs.  The WaterLink SpinTouch Labs are the ultimate tester, doing up to 10 different water test factors, in just 1 minute.
ColorQ All-Digital Water Testers Automatic Filter Cartridge Cleaner WaterLink SpinTouch Labs
#2086 ColorQ 2X, Bluetooth, Waterproof, 2nd generation all-digital pool and spa tester. Automatic Filter Cartridge Cleaners, for pools and spas. WaterLink SPIN Touch Lab
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If you have a pool or spa water testing need, we should have the product.
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How to use Mineral Sanitizers, in a spa, swim spa or hot tub?

Mineral Sanitizers are devices that supply a stream metallic ions to the spa or hot tub water. Used properly, the ions are maintained at very low levels, avoiding the possibility of staining or discoloration. Mineral Sanitizers accomplish this release, without the use of electrical components. Mineral Sanitizers are not stand alone water treatment products, but can reduce the total amount of chemicals required for proper spa or hot tub water maintenance. The metallic ions will not destroy organic buildup and contamination and will not oxidize dead microorganisms and organic debris. This requires oxidation and the use of agents such as: chlorine, bromine, non-chlorine shock or ozone. Not all of these oxidizers can be used with all Mineral Sanitizers: check with the manufacturer before adding chemicals, as to any limitations that might be suggested. A more complete sanitizing option is a salt chlorine generator, a choice of several no-installation-required models, including two smart enough to only produce chlorine, when it is actually needed.  If problems arise, refer to the Spa Problems Page, as a source of problem-solving information, broken down into various categories.  Scroll down the page and click on the linked keywords, catch phrases or images, in the archived answers below, to access additional information, on that topic or product.

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Silver Ion Use, with Ozone and a Salt Chlorine Generator?

I have a new salt water system, ozone generator hot tub. In my old tubs I would replace the silver ion sanitizer every 4 months. I was told by the technician that with my new tub, the silver ion sanitizer only needed to be changed once a year, when drained the tub. The salesman said I should still replace the ion sanitizer every 4 months. Whose right?  Thanks.

Steve, 7/28/2019
MegaChlor salt chlorine generator for spas, swim spas and pools up to 10,000 gallons.
Having both a salt chlorine generator and an ozonator should leave you not needing to use a silver ion mineralizer or anything else. The silver ions are added through an erosion process, if you have the product, that I am familiar with. In normal use, it lasts 3-4 months and then is replaced. To get it
to last a year, you would have to remove it, for 2 out of every three days. Using it should help provide extra sanitation, but it may not be necessary, based on how your spa is equipped. Spas should be drained and cleaned more often, than once a year.  Usually it is done every 3-4 months, on the residential level, based on current recommendations.  Please visit our website store to browse through a large selection pool and spa water testers, as well as many different, useful and interesting pool and spa products.

Sincerely,  Alan Schuster, 7/29/2019

MPS, Mineral Purifier And Ozonator Causing Irritation?

I would like to know if there is an alternative to MPS as a shock. I use a mineral purifier and an ozonator. But, I have eye and nasal irritation, and after many years I have finally determined it is the MPS. I typically put about 1/2 to one teaspoon of MPS in my 400 gallon tub after each use. Am I using too much? Might that be the problem? I have seen on forums that many people have linked MPS to their skin and eye irritations, and I'm thinking that might be my problem. So, is there another oxidizer that will not give me the problem?  Thank you.

Peter B., 10/15/2020

I, too, have received anecdotal information linking MPS and irritation. The simple answer is use a low level of chloSmarterSpa Automated Salt Chlorine Generator.rine, instead of MPS. A dealer is unlikely to tell you this, because eliminating chlorine was the whole point of going with a mineral purifier and ozone.  By using small amount of chlorine, you get confirmation, that both products are working, so long as it only takes small amounts of chlorine, to register on the tests. On the other hand, a salt chlorine generator, which can be used, with or without mineral purifier or an ozonator, is a complete sanitizing system. We have 5 models that require no installation. Two feature new Chlorine Detection Technology, which makes them smart enough to turn themselves on, only when there is too little chlorine. When chlorine level rises to optimum, they turn themselves off. You'll never over chlorinate again. It is definitely a better way to do chlorine and eliminates most of the problems associated with traditional chlorine: chloramine odor, measuring, handling and storage of chlorine products. I hope that this information will be helpful.

Sincerely.  Alan Schuster, 10/15/2020

Mineral Sanitizers And Oxidation?

I was just looking at some info on the ionization process for hot tubs to look after algae and such. I must admit it looks great and I bet smells better with no bromine or chlorine odors. My question is to do with the oxidation of the water. I have read where you suggest ozonators to deal with this problem. But, are they enough to keep the water fresh or do you need some non chlorine shock as well? Also is there a test you can do to check, if you have enough oxidation occurring to be safe? Thanks in advance.

Darren H., 1/27/2017

For proper spa water quality, you must have both sanitizing and oxidation! A mineral sanitizer can provide most, if not all of the s
SmarterSpa complete unitanitizing action. However, it must be used with oxidizing agents such as salt chlorine generators, ozone generators, chlorine, bromine or non-chlorine shock. Ozonators come close to providing for all of the sanitizing and oxidizing needs. Because the presence of ozone is short-lived, after the unit is shut off, a backup sanitizer is always recommended: chlorine, bromine or mineral sanitizers are most commonly used, in this backup role. Ozonators provide the necessary oxidation and greatly reduce the amount of chlorine or bromine required to maintain a level of about 1/2 the customary amount. There should be no overpowering sense of chlorine or bromine. Use a mineral sanitizer and you can almost eliminate the chlorine or bromine. The only time non-chlorine shock needs to be used is if the water quality suddenly deteriorates. If you maintain a chlorine or bromine residual, at a reduced level, the ability to maintain this lower concentration is confirmation that the oxidation needs are being met by the ozonator. After all is said and done, a salt chlorine generator is a complete spa sanitizing system, that has never been easier to use. I hope that I have helped convince you that an ozonator will be beneficial and will enhance your hot water experience.

Sincerely. Alan Schuster, 1/27/2017

What Is A Mineral Sanitizer?

I am considering a mineral sanitizer, as I am interested in reducing the amount of chemicals. How does this product work and why will I use less chlorine or bromine? Thanks.

Jack C., Florida, 1/15/2013

MegaChlor salt chlorine generator for spas, swim spas and pools up to 10,000 gallons.
Mineral Sanitizers will allow you to use less chlorine or bromine, because you will be able to achieve proper sanitizing with 1 PPM of free chlorine (instead of 1-3 PPM) or with 2 PPM of bromine (instead of 3-5 PPM). However, they are usually used with chlorine or bromine.  Instead of being
chlorine or bromine free, you'll simply be using less. Therefore, as long as you have to add chlorine, why not use a salt chlorine generator?  There are affordably-priced models, that require no installation. All it requires is a few pounds of salt, each time the spa is refilled.  I hope that this information proves helpful. Enjoy the spa.

Sincerely. Alan Schuster, 1/15/2013

Chlorine Use With A Mineral Sanitizer An Ozonator?

I have a mineral purifier and ozonator. Do I still add chlorine?  I have spa 56 dichlor granules. And what should my level be?

Jeff D. 8/24/2014SmarterSpa Automated Salt Chlorine Generator.

In spite of what any dealer may have told you, to the contrary, you would get better results and more control over water quality, if you maintain a free chlorine level of 0.5-1.5 PPM.  Because of the ozonator, less chlorine will be required, to maintain this level.  This also confirms that everything is working properly, by enabling you operate with a free chlorine level.  Chlorine provides persistent sanitation and oxidation, while ozone is very short lived.  The addition of a salt chlorine generator would afford you even more control.  I hope that this information is helpful.

Sincerely.  Alan Schuster, 8/24/2014

Ozone To Mineral Sanitizing?

Is it possible and realistic to convert my hot tub, which has an Ozonator and uses bromine, to something like the silver oxide cartridge and non-chlorine treatment?

Mike E., Evansville, IN, 12/12/2008

MegaChlor salt chlorine generator for spas, swim spas and pools up to 10,000 gallons.
Yes, you should be able to make such a switch. I suggest that you completely drain the spa remove all traces of the bromide salts. This is important, so as not to shorten the life of the silver component (you can confirm this with the manufacturer to be certain). Use the
combination of a Mineral Sanitizer and an ozone generator and you may not need the non-chlorine shock and only a low level of chlorine or bromine! The combination of a Mineral Sanitizer and Ozone is being used in many spas. A salt chlorine generator and ozonator could prove to be a very effective combination.  It will eliminate the odors, that are sometimes associated with chlorine, while providing better control.  Have fun! Hope that I have been of assistance.

Sincerely.  Alan Schuster, 12/12/2008

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Silver Oxide?

We have just installed a spa and would like to use silver oxide, but all local dealers have never heard of it. Do you have any suggestions about who sells this is the Southern California area? Thank you in advance for your help.

Nameless, California, 4/6/2011

SmarterSpa complete unit
The reason the dealers appeared to be unfamiliar is that it is not sold as silver oxide. Some Mineral Sanitizers use a silver compound, as a source of silver ions and other minerals, as well. Ask your local spa professional to provide you with information on Mineral Sanitizers.  I
hope that I have been helpful. Silver may help sanitize a spa, but cannot be used alone, as it does not oxidize wastes and organic compounds.  On the other hand, a salt chlorine generator is a complete sanitizer.  If used with silver, you can reduce chlorine usage, because it will provide a degree of backup sanitation.  Enjoy the spa.

Sincerely. Alan Schuster, 4/7/2011

Wanting To Use Less Bromine?

I have been using bromine tablets in my spa. The results, so far, have been good, but I would like to use less bromine and fewer chemicals. Any suggestions would be appreciated. Regards and thanks.

Barry M., Poughkeepsie, NY, 11/12/20012

ChlorMaker DO Salt Chlorine Geneator for Spas.
The simplest thing to do would be to add a Mineral Sanitizer, that can be used in spas, that use bromine or chlorine and it will not interfere with the expected 6-month life of the cartridge. The presence of the mineral sanitizer will allow you to maintain a lower bromine level and because less
bromine will be used, the overall water chemistry will be easier to control. Another way to reduce bromine usage, is to use a salt chlorine generator.  If in addition to the salt, you add a few ounces of sodium bromide, the chlorine being generated, will end up converting the bromides into bromine.  Just operate the salt chlorine generator, in the normal manner and it can produce your bromine needs.  I hope that this information proves helpful.

Sincerely. Alan Schuster, 5/12/2012

Tired Of Bromine?

I have a 500 gallon spa with an ozone generator. I am tired of the bromine. After perusing your website, it looks as though I could eliminate all need for bromine/dispensers by adding a mineral sanitizer to my system. I searched for those on the web and they appear to simply be a device that slips into the 'tube' in my filter and last for approximately 4 months at a time. Is this all correct? Thank you for your advice,

Steve W., Austin, TX, 8/10/2010

SmarterSpa Automated Salt Chlorine Generator.
Depending upon which Mineral Sanitizer you use, it could be that simple. However, there is one thing that I would suggest be done first.
Empty and clean out the spa, removing as much water as possible. Some mineral sanitizers can shorten the life of the cartridge, with the presence of bromine. An ozone generator, being part of your spa treatment regimen, should drastically reduce the bromine usage. Inasmuch as it is a good practice to periodically empty a spa, you might as well do it now. You could also use a salt chlorine generator, with the ozonator. The combination will provide better results and more control.   I hope that the information will prove helpful.

Sincerely. Alan Schuster, 8/10/2010

Hydrogen Peroxide?

We have a hot tub and would like to use hydrogen peroxide instead of the normal chemicals. My husband is allergic to the chlorine and bromides. How much Hydrogen peroxide do we use and what %. We were told that it should be a 10% concentration but we can't find any hydrogen peroxide above 3%. I thought maybe you could help us. Also do we need to use any kind of a shock at the first? Hope you can help! Thanks.

Jo, 7/10/2015

I am not sure that using just hydrogen peroxide will provide adequate sanitation. In pools and spas, it is used as a shock
treatment with biguanide. It is available in concentrated form in many pool and spa outlets that offer biguanide products. Have you considered the use of an ozonator and a mineral sanitizer? This combination would come close to being chlorine and bromine free. The ozonator could negate the need for hydrogen peroxide and a mineral sanitizer or ionizer would release metallic ions and act as a persistent sanitizer. Hydrogen peroxide can be used as a shock treatment and a mineral sanitizer or ionizer as the primary water sanitizer. However, in most cases better results might be obtained, if you maintain a very low level of chlorine or bromine.  I hope that I've been helpful and given you some food for thought. Good luck with your decision.

Sincerely. Alan Schuster, 7/10/2015

Too Much Monopersulfate?

Alan, I use a mineral sanitizer system and Monopersulfate (MPS). The MPS test strips show that the MPS level is WAY too high and the alkalinity and pH are at the bottom of the scale. I know how to fix the alkalinity - pH problem, but do not know how to lower the MPS level. Do I just have to wait until it goes away or is there something I can use to lower the level myself? Thank you.
Shelly M., Hanover, MD, 4/19/2010
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It is possible to add a chemical to lower the monopersulfate (MPS) level. Chlorine neutralizer will discharge the MPS
level very quickly. However, if you do nothing, the level will drop on its own. By the time you read this and find the product, I suspect that the level will be acceptable. As long as you are testing for MPS, you should add the product in smaller increments.  You can always add more - you can't take out! Monopersulfate products, for spa use, should be a buffered formula, so as not to affect the pH and TA. Check to see if the label confirms this. I hope that I have been helpful. Enjoy the spa.

Sincerely. Alan Schuster, 4/19/2010

Mineral Sanitizer, Ozone And Shock?

I am writing to ask about using a mineral purifier in my hot tub. It has an ozonator in it, as well. But, I am not sure how it really works. I have been having problems with bromine with pH bouncing around and hard to maintain. I also have been diagnosed with having folliculitis. If I switch to a Mineralizer, do I need to use an ionizer as well? I would like to get rid of the bromine use. Can you recommend a mineral sanitizer brand to use? If I switch to this system, do I understand correctly that I will only be using the mineral sanitizer, ozonator and shock? How do you test water? Do you use standard test strips and will it give proper readings on pH and alkalinity, using the purifier? Thank you so much. This is all so confusing to me.

Lyn G., Charleston, SC, 2/25/2020

If you were medically diagnosed with folliculitis, it was caused by inadequate sanitation. Ozone and bromine should have done the job. However, the combination of an ozonator, a mineral sanitizer and an occasional shock treatment should also be very ef
#2086 ColorQ 2X - 2nd Generation Pool/Spa Testerfective. A mineral sanitizer adds sanitizing metallic ions to the water. Just make sure that the ozonator is working properly and is operated for 6-8 hours daily, spaced throughout out the day into 2-hour periods. Once a week or after heavy bather usage or at the first signs of a loss of water quality, add shock treatment.  Bromine can sometimes produce false high pH readings. If you use bromine, the pH should always tend to drop.  Adding a pH Increaser should not be required, under normal circumstances.  Perhaps, bromine-pH interference was part of the problem? Test strips should be fine for the pH and TA and possibly to measure the shock level, if chlorine is used.  You might find a ColorQ 2X PRO 7 all-digital water tester, more to your liking, as it eliminates the color matching and guesswork.  I hope that I have been of assistance.

Sincerely. Alan Schuster, 2/25/2020

Better Filtration?

Followed your advice and got a mineral sanitizer to go with the ozone generator. Drained & cleaned the tub. My skin is still reacting to the spa water but everyone else is enjoying the water better now. It must be a personal problem with heat sensitive dermatitis. The company I ordered the mineral purifier from also supplied an enhanced shock which contains 58% Sodium Dichloro Triazinetrione and other stuff that they don't identify. I assume that this is still a chlorine based shock? What type of shock / chemical is non-chlorine or non-bromine in nature that I could use in conjunction with the mineral sanitizer & the ozonator? I am still monitoring the pH levels but should I still be adding a stain and scale remover every week as the Tub manufacturer recommends? Do I need to add anything else? I have 2 filters that I rotate once a month but rinse off once a week in between. When I rotate should I just soak them in a filter cleaner or should I shock them first? How long should they remain in the filter cleaner solution? My spa supplier says 24 hours & then let them dry thoroughly, other sources have advised that they should soak for a couple of weeks. Also does a solar blanket on the water surface help keep the ozone in the water? Sorry for all the questions but I definitely appreciate the help you have provided me with. Thanks.

Roger J., Dundas, Ont., 3/30/2006

The 58% product is sodium dichlor and you can use it. Just try and keep the free chlorine level at 0.5-1.5 PPM. Less than
METALTRAP Filters remove iron, copper and manganese.normally amounts should be adequate, because of the presence of the ozonator. A solar blanket could make a slight difference, but it could be hard to quantify. Potassium monopersulfate shock is a non-chlorine product. You need one or the other. I would stop adding the stain and scale product or verify that it can be used with the mineral sanitizer. Unless your calcium hardness is very high, over 400 PPM, a scale preventative should not be required.  If you source water contains iron, copper or manganese, you might want to add a MetalTrap Filter, to the garden hose, used to add water to the spa.  You might be complexing (chelating) the metallic ions and rendering them less effective. Spa filters are not very effective, under the best of circumstances. A higher efficiency product might be beneficial. The better filtration couldn't hurt your dermatitis problem either. Otherwise, clean according to the manufacturer's instructions. I hope that this information proves helpful.

Sincerely. Alan Schuster, 3/31/2006

How A Mineral Sanitizer Works?

I'm using a Mineral Sanitizer Cartridge in my spa. I add some non-chlorine shock after each use. I like it because there is very little odor, if any. Exactly, how does this cartridge reduce chlorine requirements?

Dennis G., 1/14/2010

The Mineral Sanitizer contains metallic ions, in a form that allows for slow release into the spa water. This is done without the use of
electrical components, as is the case with Ionization Units. The ions, copper, silver or zinc, are released into the water in ionic form. This is the most active form and allows the ions to function as sanitizers, at very low concentrations. Chlorine is normally used to provide this type of sanitizing action. However, chlorine will also destroy and decompose organic wastes and debris. Because metallic ions cannot destroy the organic contamination or prevent further buildups, it is necessary to add an oxidizer to do this job. That is the reason for adding the non-chlorine shock. Maintaining a free chlorine of that favors the low end of 1-3 PPM, helps assure proper sanitation, at all times. The use of a Mineral Sanitizer should reduce the overall chemical usage and make control of the water chemistry easier. Enjoy the spa. I hope that I have been helpful.

Sincerely. Alan Schuster, 1/15/2010

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