Thank you, B.L., for your inquiry.  The  WaterWorks Total Hardness Test Strips (480008) CAN get used to test pool water.

Importance of Water Hardness in Swimming Pools

Pool owners should test for water hardness for several reasons including:

• Soft water (low hardness) can act in a corrosive manner and 'pull' elements out of pool surfaces resulting in liner damage and/or pitting of pool surfaces.
   
• Hard water (high hardness) will not allow other chemicals such as chlorine tablets and powders or pool water balancing chemicals to dissolve in the water.
   
• Very hard water may leave tough-to-remove calcium deposits on pool surfaces.
   
• Improper water hardness balance in pool water can result in other chemicals not functioning properly.

What is Difference Between Calcium Hardness and Total Hardness?

Total hardness readings include concentrations of calcium as well as magnesium where as calcium hardness readings include only dissolved calcium concentrations.

What is Considered Hard Water and What is Considered Soft Water?

For drinking water, tap water and well water purposes:

• Very Soft Water: 0 - 40 ppm total hardness
   
• Soft Water: 40 - 120 ppm total hardness
   
• Hard Water: 120 - 425 ppm total hardness
   
• Very Hard Water: Greater Than 425 ppm total hardness

Grains per Gallon vs. Parts per Million

Depending upon where you look, water hardness gets reported as grains per gallon (GPG) or parts per million (PPM).

To convert between the two measurements, simply divide your parts per million value by 17.5 to get grains per gallon or multiply your grains per gallon value by 17.5 to get parts per million.

How long after the expiration date will they work?

We recently posted an article on the topic of short shelf life test strips on this site because we get asked this question a LOT. You can read that article here: Do Tests Strips with Short Shelf Life Still Work?

To answer the question directly, though, we have this to say: “If properly stored since the date of manufacture the products should still work, but no one will guarantee the product’s accuracy beyond the date stamped on the bottle.”

The answer above actually applies to pretty much ALL products that come with expiration dates if you think about it. But, in order to hedge off lawsuits from potentially disgruntled consumers with really old or poorly stored products, manufacturers do have to put a time limit out there.

Are WaterWorks Total Hardness Test Test Strips the right product?

Regarding the matter of ‘is the WaterWorks Total Hardness Test Strip the best product for you, that would all depend on what you believed you needed to test — since this product detects only Calcium and Magnesium.

If looking just to make certain your water softener functions as expected, meaning it reduces calcium and magnesium hardness as described by the unit’s manufacturer, then we believe WaterWorks Total Hardness Test Strips should work just fine for what you want to do.

Now on the other hand, if you have curiosity about other potential water contaminants (i.e. lead, nitrates/nitrites, coliform bacteria, arsenic, etc.), then this product will not cover all those bases and you will want to consider a product that perhaps includes total hardness test strips as well as test for the other items you would like to test for.

If the latter situation sounds more like your situation then we suggest you consider a multi-parameter water test kit like the SenSafe Water Quality Test Kit, WaterWorks COMPLETE Test Kit, or the WaterSafe City Water Test Kit.

Each of the those kits offers slightly different water testing options and each comes with easy-to-follow directions that make testing one’s water for a number of critical water quality parameters a painless process.

So, with that in mind, we would like to thank DodgeGirl for having the courage to ask a question about water hardness that many other folks may also want the answer to.

What does total hardness include?

While it may sound reasonable, and possibly even logical in many ways, that water hardness would include ‘hard’ substances like iron, copper, chromium, zinc, and various other water metals, a total hardness reading includes only a combination of the following two elements: Calcium & Magnesium.

Testing for total hardness?

Several methods for total hardness testing exist and the easiest method, dip-and-read total hardness test strips, usually take less than a minute to use, do not require the use of potentially dangerous or hazardous reagents, and cost very little — usually less than $10 for a bottle of 50 tests.

Testing for iron?

Earlier in this article we posted an image that will take you to our online store where you can purchase the WaterWorks Total Iron Visual Test Kit which, as its name implies, allows you to visually determine the amount of total iron in your water source — unlike a number of other iron tests which detect only dissolved iron.

Our well water before filtering was high hardness according to the builder when we moved into our new house and we saw that the first time dishes got done. We had SPOTS on all the glasses plates and cups. Then the bathtub junk started and we had lots of scummy caked on stuff that we had to clean out of the showers a lot. SO we put a water filter in and the scummy junk all but disappeared… but water now feels slippery and like it dowes not get all the soap off us when we shower. Is that normal?

After doing a bit of research we found conflicting answers regarding why softened water feels slippery to the touch.

• We read in a Culligan Water (Mid-Missouri) article that soft water does not have ‘scum’ (calcium & magnesium ions bonded to soap particles) that gets deposited on your skin and since your skin therefore has no ‘scum’ on it to cause friction, water then feels slippery.
   
• On a Collective Science Q & A Site we read that the slippery feeling comes from the depositing of soap ions that would ordinarily have bonded with the calcium and magnesium that the water softener took out. Apparently in the absence of those metals the skin’s weakly positive charge becomes a magnet for negatively charged, free-floating soap particles. Therefore, the deposits on skin make water seem slippery.

Which do we believe? Although both answers seem somewhat plausible, we believe that the first answer has a lot more merit. Why do we believe that? Quite simply, since soft water fails to leave deposits on other surfaces that possess weakly positive charge, why would it selectively leave deposits on the skin?

Testing for water hardness (aka: total hardness)

The simplest water test method for hardness involves using a dip-n-read testing product such as the WaterWorks Total Hardness Test Strip. Just dip the indicator test pad into a water sample, remove it, and match the developed color to a corresponding color on the product’s color chart.

Will too much or too little hardness hurt me?

We have yet to hear of any cases where overly hard water negatively affected the health of a person and, coincidentally, we have also not heard of a case where softened water negatively affected a person’s health.

Hard water WILL, however, shorten the life expectancy of plumbing, water heaters, refrigerator ice makers, washers, and any other devices that use (or transport) water in your home. Oh, and it will increase the amount of cleaning you will have to do in the shower stall to get the ‘soap scum’ off of, well, pretty much every surface.

In this day and age where virtually, and sometimes literally, every penny counts in a family’s budget, finding ways to save money matters — but when it comes to investing in your family’s safety through the use of a water filter, make certain you purchase and install the correct filter(s) for the job at hand!

While a water softener typically does have the ability to remove some amount of dissolved iron from water, the act of removing iron can do serious damage to the mineral bed designed specifically to reduce water hardness. If pressed to remove iron on a regular basis the damage can eventually add up… to the need for an expensive service call by water filter technician.

Another way to think about it: Asking a water softener to do anything other than remove water hardness lessens the device’s water softening efficiency, interferes with the proper operation of the device, typically causes damage to the device, results in higher than normal consumption of salt by the device, and may result in your having to pay someone to come out and repair your softener after its adsorption media gets plugged up with iron.

Pick the right tool for the job at-hand

When attempting to turn a screw would you A) Hit the screw w/ a rolled up newspaper; B) Use an app on you iPhone; or C) Turn the screw with a screwdriver. Hopefully you chose ‘C’ just now.

The same sort of logic applies to water filters, as well. Filter Water, an online vendor of drinking water filters we recommend on a regular basis carries several types of water softeners and homeowners can install separate inline iron, sediment, multi-filter, etc. cartridges to work in conjunction with the water softeners Filter Water carries.

On the topic of iron removal, however, the experts at Filter Water suggested, “To treat up to 3 ppm ferrous or ferric iron (metal iron), use Pentek RFFE20-BB Iron Reduction Filter in a Big Blue 20×4.5 Housing. If iron is above 3 ppm or if it is bacteria-based, use Iron and Hydrogen Sulfide Whole House System up to 15 ppm. If iron level is above 15 ppm, or for line larger than 1″, look at Commercial Iron Removal Systems.”

With that said, today’s inquiry came to us from ‘Cass’, a concerned woman from North Carolina with concern over the origin of high hardness in her drinking water.

Hi. Can you explain why water has hardness in when it when it comes out of a well? If rain water becomes well water wehere does the hardness come from? Shouldn’t the water just be water?

Thank you for the question, Cass. When droplets of rain water form in the atmosphere they contain nothing but good old hydrogen and oxygen with no dissolved minerals. In that state the water has a tendency to react with pretty much any and everything it comes in contact with and our atmosphere contains quite a bit of carbon dioxide.

As the water mingles with atmospheric carbon dioxide a weak acid (carbonic acid) forms. That acid makes the water slightly more aggressive and once the water reaches the ground it then filters down through soil, rock, bedrock, etc. where it has a chance to dissolve and then absorb tiny amounts of each of those materials.

The more aggressive the water becomes on its trip down through the atmosphere and/or the more contact the water has with the ground as it makes its way through the Earth and into an aquifer, the more dissolved minerals (i.e. calcium, magnesium, metals, etc.) the water will contain when pulled up by a well for use in one’s home.

Testing for water hardness?

While wet chemistry titration test kits have provided reliable water test results for many years they do not have the same monopoly on accuracy, reliability, affordability and ease of use that test strips such as WaterWorks Total Hardness possesses.

The WaterWorks Total Hardness test strips allow interested parties to perform total hardness in water testing in under 15 seconds and get results they can depend on each time.

Perils of hard water?

Too much dissolved calcium (or magnesium) in water can result in increased soap/detergent consumption for washing machines and dishwashers, lackluster performance of shampoos & conditioners, dry skin, dish (water) spots, bathtub rings, clogged plumbing, and a host of other problems — some of which cost a lot of money to fix!

For more information on the effects of hardness (dissolved calcium & magnesium) in water and/or how to soften, treat or otherwise condition hard water, please check out the articles in Water Testing Blog’s Hardness Archives and Water Softener Archives.

Popular articles in those archives include:

• Water Softener That Does Not Use Salt?
• Is Soft Water Salty?
• Converting Grains per Gallon (GPG) to Parts per Million (ppm)
• What Should You Test if You Have City/Municipal Water?

If after testing your water for hardness you determine that you need (or would like) to purchase a water softener, we suggest taking a look at the products offered by Filter Water, a leading online retailer of traditional ‘salt-based’ water softeners as well as the more modern and environmentally friendly ‘salt-free’ water softeners

An ex-employee at an asphalt company has come forward recently with allegations that higher-ups in the company encouraged him to submit fake water samples (taken from a rainwater collection bucket) and submit them for testing by the Oregon Department of Transportation… because the higher-ups feared actual testing of their waste water stream would reveal code violations.

Nothing makes the taste of fresh, clean drinking water vanish quite like… runoff from an asphalt plant, right? Even just saying that to ourselves as we put together this blog posting turned our stomachs.

So, if unlike ourselves you actually believe all of required environmental testing gets done in the proper manner, perhaps now you will see things a bit differently and start testing your water on, at the very least, a semi-regular basis?

Think we made up this story? Not! Read the source article here.

Common water contaminants to test for?

Although far more sinister compounds and elements exist in our world that could enter our water supply (i.e. organic solvents, radioactive isotopes, etc.), we routinely suggest testing for heavy metals as a good starting point because whether you have city/municipal water or your water comes from a well or spring, metals can pretty much always — under the right circumstances — find a way into the water supply.

• Well casings typically get made out of metal.

• City/Municipal water must travel through miles of metal piping before it gets to one’s residence.

• Water extracted from wells comes in contact with rocks and soil that all contain traces of metals.

• While most homes these days contain plastic plumbing, many older homes still contain metallic plumbing (copper w/ lead-laced solder at the joints) plumbing… and metal lines get used to connect most homes (regardless of age) to the municipal water system.

What should I test for next?

After dissolved metals in water testing things get a bit murky. Pardon the expression.

Folks with well water may want to test for all sorts of things such as nitrates, nitrites, coliform bacteria (important!), hydrogen sulfide, arsenic, etc. while folks on city water may want to test for specific metals such as copper and lead, total hardness, free chlorine, total chlorine, etc.

No matter what type of water you have going into your home, school or place of business, only regular testing of the water’s quality will let you know if you have anything to worry about when it comes to the safety and purity of the water you drink.

Many times in nature soft water will occur in water that has become acidic for other reasons and for the longest time people blamed the water’s lack of dissolved minerals when they really should have looked much more closely at the water’s obvious acidity problem.

As a general rule, acidic water behaves in a corrosive manner regardless of its dissolved minerals content (hardness). Therefore, when trying to solve corrosion problems in drinking water situations, please stop blaming softened water! 🙂

Got a problem with corrosion in your pipes? Test the acidity of your water with pH test strips or a pH meter because most of the time you will find that your water’s low pH is to blame.

Fairytale: All soft water is salty and corrosive?

We heard another interesting story involving a misinformed plumber telling his unsuspecting, naive customers that soft water is inherently salty and therefore corrosive.

First of all, soft water exiting a water softener should not have become salty unless the salt already existed in the source water or the water softener’s backwash cycle has started to malfunction. Testing your water before it enters the water softener with a device like the HM Digital COM-100 TDS & EC Meter will tell you if your source water contains salt.

Secondly, as we stated earlier, naturally occurring soft water tends to show up in water that has become acidic for reasons other than its soft or hard character. Testing the acidity of your source water with easy, inexpensive pH test strips or a more precise device like the waterproof PH-200 Water Testing Meter will tell you if your source water has too low (or high) of a pH and may need correction.

Note to swimming pool owners…

The rules regarding water hardness and drinking water do not apply to the water in your backyard oasis. The unique chemistry of pool water typically requires that the water contain a lot more hardness, usually in the form of dissolved calcium, to remain in balance.

Interested in learning more about pool water testing? Take a look at the articles posted in our pool water archives.

A glass of water containing that low an amount of sodium qualifies for the US Food & Drug Administration’s “very low sodium” category.

Why do water softeners contain salt and/or sodium?

The majority of water softeners utilize a resin bed, which you can see at their website, comprised of negatively charged plastic beads packed with positively charged sodium ions. As source water passes through the bed of beads, calcium and magnesium ions with stronger positive charges disrupt the sodium ions’ bonds with the beads and form their own bonds with the plastic beads.

Eventually after a water softener operates for a while the supply of sodium ions in the resin bed gets depleted and when that happens the resin bed must get recharged using a concentrated salt brine solution that more or less overpowers the collected calcium and magnesium and causes them to become dislodged from the plastic beads. Sodium molecules then take their place on the resin beads and the magnesium, calcium and excess sodium molecules get flushed out of the system.

After a properly completed flushing and rinsing, a water softener operating properly ought not produce water that has a salty taste since all of the actual salt (NaCl) should have gone out as waste water during back washing.

Measuring water hardness

Scientists typically measure water hardness using one of two scales: Grains per Gallon (GPG) and Parts per Million (ppm). One grain per gallon of hardness equals approximately 17.1 ppm of hardness.

You may also see ppm expressed as milligrams per liter (mg/L) in some literature.

Rating categories for water hardness

As a general rule,

• Water that contains less than 1 GPG or 17.1 ppm hardness gets labeled as ‘soft’.
   
• Water that contains between 1 and 3.5 GPG, or 17.1 to 60 ppm, hardness gets labeled as ‘slightly hard’.
   
• Water that contains between 3.5 and 7 GPG, or 60 to 120 ppm, hardness gets labeled as ‘moderately hard’.
   
• Water that contains between 7 and 10.5 GPG, or 120 to 180 ppm, hardness gets labeled as ‘hard’.
   
• Water that contains between greater than 10.5 GPG, or 180 ppm, hardness gets labeled as ‘very hard’.
   

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The results of a recent study revealed that 1 in 5 Americans admitted to peeing in the pool. Keep in mind that more people probably pee in the pool and just didn’t want to admit it. Gross!

If you’re taking a refreshing dip in a pool with four other people, odds are one of you is urinating. This is not gross-out myth, but cold, depressing fact from a recent survey conducted by the Water Quality & Health Council, a scientific research group sponsored by the American Chemistry Council.

The survey, conducted in April, asked nearly 1,000 adults whether they urinate in pools. One in five bravely admitted their mistakes. And those are the ones who admitted it.

…

It is easy isn’t it? Maybe that’s because many of us were taught as kids that chlorine counteracted any accidents. Technically, that’s mostly true. If pool operators maintain proper chlorine and pH levels, most waterborne germs are killed on contact.

But 54 percent of public pools tested by the WQHC last year failed to provide the proper chlorine levels and 47 got low marks for pH balance. You can blame poor pool maintenance, but frequent urinators don’t help.

…

To find out of your pool is safe, look for some tell-tale signs of bacteria.

“Check if you see the bottom,” says Dr. Wiant. “If a pool is clear it’s likely very clean and balanced, but if it’s it cloudy or the sides are slimy, those are signs that bacteria is prevalent and the pool isn’t filtering out germs the way it should.”

Hyper-vigilant swimmers can also purchase pool test strips at any drug store and do their own scientific assessment. “They’re easy to use,” he adds, “just crack one open and dip it in the pool and you’ll be able to tell right away if the pool is clean.”

Another signal it’s time to get out of the pool: burning, stinging eyes. Although it’s not seriously harmful, when “urine combines with chlorine it becomes an irritant,” Wiant says. So if you find yourself squinting in pain after a dive, ask yourself why that person doing the backstroke in the next lane looks so relaxed. It’s not that nice of a day. ( source )

Do us all a favor, folks and PLEASE stop peeing in the pool! The Center for Disease Control has monitored pool water quality for many years now and the number of illnesses contracted from contaminated swimming pool water has increased steadily.

Some blame the increase on poorly maintained pool water but in the end it comes down to one thing in our minds: Garbage In, Garbage Out.

Shower before swimming: If everyone removed the oils and other bodily secretions from their bodies before entering the pool the chlorine and filter would have less to clean up.

Shower after swimming: Clean the pool off of you after a swim. We suggest this for two reasons: 1) Chlorine dries out your skin; 2) Perhaps a fellow swimmer, one of the 20% that admits to peeing in the pool, unknowingly had a contagious health condition that he or she passed into the water at some point. Do you REALLY want to walk around with THAT on your skin the rest of the day?

Preventative measures

Aside from showering before a swim and using the proper urine receptacles (Toilets, people! Use the toilets!) when nature calls, keeping an eye on pool water quality will go a long way towards making sure everyone has a safe, clean and enjoyable time in the pool.

Detecting a strong chlorine smell in swimming pool water does NOT always mean the water is safe. If, for example, the pH goes out of range the chlorine will not work nearly as effectively at neutralizing unwanted bacteria and other organic contaminants.

Therefore we, like the article, suggest testing pool water before diving in. Easy-to-use pool water test strips like the Pool Check 3-Way test kit give accurate, reliable water test results for free chlorine, pH and total alkalinity in under a minute.

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So what have we learned? Hopefully you have learned NOT TO PEE IN THE SWIMMING POOL ANYMORE and will urge all those around you to stop peeing in swimming pools, lakes, oceans, rivers, etc., too!

Oh, and we also suggest maintaining proper water chemistry in your pool at all times. This means you will need to TEST the pool water for critical pool water quality parameters including, but not limited to free chlorine, total chlorine, pH, and total alkalinity on a regular basis.

For that task we recommend Pool Check 5 Way Test Strips currently available in our Water Test Kit Store. This product comes in a bottle of 50 and has a total test time of less than a minute!

Testing of public pools?

While we would LOVE to think all operators of public pools keep a vigilant eye on the quality of their pool water… we worked in the pool industry for a while and came across a number of pools that LOOKED clean and tidy but had all sorts of water quality issues that could have resulted in swimmers getting sick if a harmful bacteria or parasite had found its way into the water.

Before hopping in the water you should take a minute to use a product like the Pool Check 5 Way Test Strip to make sure the water contains, at the very least, a proper amount of free chlorine.