7 Best Digital Pool Water Tester Reviews of 2019 | Electronic Spa Kits/Analyzers to Test Chemicals

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When it comes to regular swimming pool maintenance, water testing is essential and digital testers are convenient and efficient way to keep pool water well balanced and safe. Digital pool water testers are much more convenient than even the best swimming pool water test kits.

Digital water testers, also known as electronic pool water testers, utilize metallic probes and internal software to measure various aspects of your pool water. They test sanitizer levels, pH and TDS (Total Dissolved Solids) and some models also measure TA (Total Alkalinity) and CH (Calcium Hardness) levels as well. A chemical imbalance will allow algae to grow, and will require an effective algaecide to get rid of the annoying plants.

Since some pool water elements change slower and others faster, you should test the water in different frequencies: pH and chlorine are daily, alkalinity weekly and calcium hardness and stabilizer levels monthly. Therefore, digital testers are there to make the testing precise and quick.

Best Digital Water Tester Comparison


  • Six Testing Options 
  • Large LED display  
  • Convenient and reliable 
  • Last test saved is a convenient feature


  • Seven Testing Options  
  • Accurate Reading  
  • Easy & Convenient to Use  
  • Carrying Case Provided


  • Accurate reading (within 2%) 
  • Light, simple and easy to use 
  • Auto-off function
  • Hold Function saves measurements


  • Tests the important factors in your pool chemistry 
  • Water resistant housing 
  • Easy to read LED display


  • Auto temperature compensation  
  • Accurate reading (0.01 pH)  
  • Light, simple and easy to use  
  • Multiple pH testing use


  • Accurate results (within 3%)  
  • Hold Function saves measurements  
  • Auto-off function saves batteries  
  • Simple and easy to use


  • Two test options 
  • Large backlit easy to read display 
  • Rugged and accurate 
  • Last test saved is a useful feature

Buying guide

The testing features

In order for you to have a crystal clear and well balanced pool, you have to make sure that the chemical levels stay within the following ideal range:

  • pH: 7.2 – 7.6
  • Alkalinity: 80 – 120 ppm
  • Free available chlorine: 1-3 ppm
  • Calcium Hardness: 180 – 220 ppm
  • Bromine: 3-5 ppm
  • Cyanuric Acid: 30 – 50 ppm

Digital water testers truly give you far more accurate results than most previous testing methods. Therefore, they provide easy and precise readings as long as they can test most of the above values.

Here are a few explanations why the following testing options in our digital pool water tester review are important.

The pH test is crucial in maintaining the ideal pH range of 7.2-7.6. Below that range, pool water becomes acidic and above that range, sanitizers may not work effectively.

Alkalinity test measures the ability of water to prevent pH fluctuations.

Free chlorine test is always included in the best pool test kits. Free chlorine is the main sanitizer in your pool. This test is important so that chlorine can perform optimal sanitation. Otherwise, too much chlorine can cause irritation to the skin or leave noticeable and unpleasant smell of the pool water.

Cyanuric acid (CYA) test measures the level of stabilizers and conditioners. CYA is usually present in commercially available chlorine, which each best pool water test kit will register. The level of this element must be kept within the proper range to maintain the disinfecting ability of chlorine. CYA also minimizes the destruction of chlorine by sunlight.

Calcium hardness test shows how ‘hard’ or ‘soft’ your pool water is. High levels of calcium can indicate that scale may form on the inside of your pool and on the heating elements or inside the pool pump. High levels of calcium hardness can also cause sore eyes and skin irritation. If the water is too ‘soft’, metal surfaces inside the pool might corrode.

Ease of use

Most pool owners are homeowners who simply want to keep maintenance costs low by testing their pool water themselves. That is why the best pool test kits in the form of digital testers need to be easy to understand and use. Check that the manuals, test instructions, and reading interpretations are included.

Accuracy of results

digital water tester

Start by buying from reputable suppliers and trusted brands. Carefully read reviews for each of testers you have shortlisted. Ask friends and family who own swimming pools which testers they have and are happy with. 

After buying an electronic pool water tester, you can ask someone to test your pool water simultaneously with you using their trusted tester so you can compare results.

Most automatic digital readers for home use allow you to utilize a small hand-held photometric (or light measuring) tester that is fast, affordable and takes the guesswork out of testing your pool water.

The best pool digital testers are generally compatible with salt systems as well. Most models have easy-to-read digital LCD screens and give exact numbers for the readings compared to deciding whether conventional color coded stripes match the colors on the results chart.

We hope our digital pool water tester reviews will help you find the best digital pool water tester for your needs. Read on!

Best Digital Pool Water Testers Reviews

Now that we've gone over what to look for in the best pool digital tester you can check out the below digital pool water test comparison information.

Editor Rating:


LaMotte 2056 ColorQ Pro 7 Digital Pool Water Test Kit features an innovative dual-optic design. 2056 ColorQ pro 7 provides more accuracy and more test factors. This kit eliminates the need to visually determine fine color variations or use look-up tables, making the pool water testing easy and quick.

The unique, multi-test ColorQ pool and spa hand-held photometer reads seven test factors: Free Chlorine, Total Chlorine, Bromine, pH, Alkalinity, Calcium Hardness, and Cyanuric Acid. 2056 ColorQ pro 7 is probably your best digital pool water tester kit for various testing.

Once you fill the test tube with water and add the reagent you want, you simply press the button and the results come clearly visible directly on a digital display. 2056 ColorQ pro 7 digital pool tester uses liquid reagents for all test factors except Cyanuric Acid, which uses tablets.

LaMotte 2056 ColorQ Pro 7 Digital Pool Water Test Kit

The testing is very simple. You simply fill the vials, add 5 drops of whichever testing agent you are working with and then insert the vial into the tester press the button, it gives you the reading.

Allow tubes to dry before returning them to case and always replace reagent caps carefully. The manufacturer suggests that you use only LaMotte replacement reagents. When the two AA batteries which come included get low, you will read a battery low message.

After comparing test results with the desired optimal balance means you will know exactly how much chemicals to add. You will no longer buy and apply more chemicals than you need, which will save you money.

The directions (in English, French and Spanish) are very clear and easy to understand. They include photos to make it easier for you and all the instructions are on a single sheet of paper, which you can fold up and keep with the kit for easy access each time you want to test the water in your pool. 

Things We Liked

  • ​Water resistant housing
  • ​Seven test options
  • ​Accurate reading
  • ​Convenient and easy to use
  • Carrying case provided

Things We Didn't Like

  • Not 100% consistent in readings



Editor Rating:


HM Digital TDS-4 Pocket Size TDS Tester Meter is ideal for all water purification applications, pools & spas, drinking water testing, ,fresh water aquariums, hydroponics, and colloidal silver.

TDS stands for any salt, metal or mineral in the water. With the push of a button, the TDS-4 will tell you your overall water purity level. This will be displayed on the screen in ppm (parts per million). The lower the TDS level, the purer the water. (The reading of 0 ppm means pure H2O.)

HM Digital TDS-4 Pocket Size TDS Tester

This smallest and lightest TDS (total dissolved solids) meter on the market is perfect for both consumer and commercial use. It has sleek design outside and advanced microprocessor technology inside. It measures 5.5 x .9 x .55 inches and weighs only 1.2 oz.

The cap is for storage and protection only. For best pool water testing results, use a larger beaker, cup or a glass so there is a larger volume of water that will be tested. To ensure a long lifespan of your product, the pH/ORP sensors should be stored wet, in the proper electrode storage solution.

Its Hold Function saves measurements for convenient reading and recording and

Auto-off function shuts off the meter automatically after 10 minutes of non-use in order to conserve batteries.

The display is large and easy-to-read LCD screen type. This automatic pool tester is factory calibrated with a 342 ppm NaCl solution and it can be recalibrated with a mini-screwdriver.

It is powered by 2 x 1.5V button cell batteries which are included (LR44 or equivalent) and which provide about 1000 hours of usage.

It provides accurate readings but bear in mind that these vary: the depth and position of the probe in the water sample may affect the conductivity. For example, if a meter is dipped into the water, removed and then dipped into the water again, but in a different spot, the reading may change. This is sometimes the case with even the best pool digital test kit.

Other factors causing the difference in readings are air bubbles, electrical charges off fingers or sample cups, air bubbles and the temperature at the time of measuring. However, TDS-4 tester has a built-in sensor for Automatic Temperature Compensation of 33 to 122 degrees Fahrenheit.

Things We Liked

  • ​Hold Function saves measurements
  • ​Accurate reading (within 2%)
  • ​Light, simple and easy to use
  • ​Auto-off function

Things We Didn't Like

  • No temperature reading



Editor Rating:


6-in-1 Electronic Pool and Spa Water Tester
is made by Bluewave which has been in the pool, spa and accessories market for over a decade. 6-in-1 pool and spa digital tester is our top choice in this set of electronic pool water tester reviews.

Probably the best digital pool water tester as regards the number of functions, 6-in-1 tester measures salt content, pH, free chlorine, ORP, TDS and water temp (C or F). It’s an essential tool in maintaining your water at its optimal condition for safety and enjoyable swim. It includes pH 7.0 buffer packet for monthly calibration.

As is the case with all the best digital pool water testers, you don’t need to buy reagents or test strips. You can now test your pool, spa, pond or aquarium water quickly and have accurate in the results and with no color matching required. All you have to do is collect water sample with onboard cup, place sensor in water sample, and press “start" and your results will appear on the digital display in seconds.

It features a robust 11"H x 6"W x 1.5"D water resistant housing with commercial grade technology sensor. The tester is powered by 2 AAA Batteries included and there is Auto Power Off feature which conserves battery life.

6-in-1 Electronic Pool and Spa Water Tester

Easy to push buttons are ergonomically positioned for more convenient use and the testing results will display in seconds on the large LED screen. The last reading is saved until a new test is taken, which is also a convenient feature if you want to compare results.

To ensure that the readings are accurate, calibration should be performed once a month. In order to calibrate the tester, a buffer solution is used. This solution is easily made using the buffer packets provided with the original purchase.

As for the care of the probe, do not soak the probe in any cleaning solution as it may cause a reference potential change which will cause unreliable performance and inaccurate results. When cleaning the probe, use distilled or tap water and be careful not to scratch or damage the glass testing surface.

Things We Liked

  • ​Six test options
  • ​Water resistant housing
  • ​Large LED display
  • ​Convenient and reliable
  • Last test saved a convenient feature

Things We Didn't Like

  • Chlorine levels are descriptive (“low, good, high”) rather than numerical



Editor Rating:


Trutest Digital Reader
by Aqua Chek was developed specifically for the pool and spa owners. It accurately reads free chlorine, bromine, pH, and total alkalinity on test strips in 15 seconds without the need to visually match colors.

To maintain a clean and clear pool, Trutest Digital Reader will help you keep the free chlorine level in the right range. Free chlorine is the portion of the total chlorine which remains in chlorinated water as it has not reacted to contaminants. This tester will tell you whether there is enough free chlorine to kill bacteria and other contaminants.

This tester is lightweight, water resistant, and has a large LCD screen which is easy to read. Trutest Digital Reader will only work with the TruTest Digital Test Strips (NP208). It comes with 25 TruTest strips which will last you for quite some time. This digital tester requires 2 standard AA batteries which are not included.

Trutest Digital Reader is easy to operate. First you press Power ON. Once the display reads “On”, you place the tip of a strip into back end of channel, pad side down. Be careful not to slide the test strip across the glass. After that you press the Start button and dip the strip at the same time. Then remove the test strip immediately and wait for the results.

The results for Free Chlorine, pH, and Total Alkalinity will appear at the same time in 15 seconds. The status LO=Low, OK=Ideal, HI= High is displayed to the left of each digital value. No need to match the colors and check the charts, just follow the instructions provided and remember not to use the tester in the direct sunlight as you will not get accurate results. Also, you have to shake off the excess water from the test strip.

Aqua Chek Aqua Chek Trutest Digital Reader

Things We Liked

  • ​Tests the most important factors in your pool chemistry
  • ​Water resistant housing
  • ​Easy to read LED display

Things We Didn't Like

  • Readings are descriptive (“LO=Low, OK=Ideal, HI= High”)
  • Inconsistent and too sensitive ( to sunlight and testing glass section) to be accurate in all readings



Editor Rating:


VANTAKOOL Digital PH Meter
is perfect for testing pH balance of your pools, spas, drinking water, aquariums or hydroponics. This digital pH meter has a sensitive electrode sensor to read accurate pH levels.

VANTAKOOL Digital PH Meter

PH must stay in the proper range to maximize the efficiency of chlorine but also to ensure safe and enjoyable pool use. Out of balance pH can damage metal equipment and plaster walls. More importantly, human body has a pH between 7.2 and 7.8 so, if the pool water isn’t kept in this range, swimmers will start to feel irritation of their eyes and skin.

The VANTAKOOL PH meter has an auto temperature compensation feature that adjusts to water temperatures and water quality to give instant and accurate pH readings. In addition, you can calibrate the tester with one touch button using VANTAKOOL Buffer Powder provided.

This tester is lightweight and easy to use. Just remove the protective cap and immerse the PH meter electrode in the solution. Then press the button for testing. It’s more convenient and easier than trying to distinguish the colors of a litmus strip.

The product package includes 1 x PH Meter, 3 Calibration packets, 1 Carrying case and 1 User's manual with the instructions how to use and calibrate the tester. The instructions are pretty straightforward and not as complicated as you might expect.

Don't be put off by the number of steps for calibrating the tester. It really is easier than you think and it’s super easy to use the tester after calibration. This meter calibrates very fast and provides accurate readings afterwards.

Things We Liked

  • ​Auto temperature compensation
  • ​Accurate reading (0.01 pH)
  • ​Light, simple and easy to use
  • ​Multiple pH testing use

Things We Didn't Like

  • Glass a bit fragile



Editor Rating:


HM Digital TDS-EZ Water Quality TDS Tester

HM Digital TDS-EZ Water Quality Tester is the most affordable TDS (total dissolved solids) meter on the market. Ideal for home use, it has sleek a design outside and advanced microprocessor inside. It measures 1 x 1.2 x 6.1 inches and weighs 2.2 oz.

Its Hold Function saves measurements for convenient reading and recording.

Auto-off function shuts off the meter automatically after 10 minutes of non-use in order to conserve 2 x 1.5V button cell batteries which are included. The batteries are LR44 or equivalent and will provide about 1000 hours of usage.

HM Digital TDS-EZ Water Quality Tester has a measurement range: 0-9990 ppm testing in increments of 1ppm from 0-999 ppm. From 1000 to 9990 ppm, the resolution is in increments of 10ppm, indicated by a blinking “x10” image.

Slick looking translucent blue housing is very strong and durable. It includes a TDS chart sticker on the back of the meter that explains TDS values. TDS (total dissolved solids) stands for any salt, metal or mineral in the water. The lower the TDS level you have, the purer your water is.

The display is large and easy-to-read LCD screen type. This automatic pool tester is factory calibrated with a 342 ppm NaCl solution and can be recalibrated with a mini-screwdriver.

Things We Liked

  • ​Accurate results (within 3%)
  • ​Hold Function saves measurements
  • ​Simple and easy to use
  • ​Auto-off function saves batteries

Things We Didn't Like

  • No temperature compensation feature



Editor Rating:


Solaxx Salt Dip 2-in-1 Salt Water Electronic Tester
measures salt content in ppm (parts per million) and water temperature. If you buy Solaxx Salt Dip 2-in-1 automatic pool water tester you will never need to buy reagents or test strips again. You’ll be able to test your pool, spa or aquarium water quickly and easily.

One of best digital pool water tester units for salinity and temperature only, Solaxx Salt Dip 2-in-1 features a large display which is backlit and easy to read. The digital display will show the results in a matter of seconds with no calibration required. Way better than your average pool test kit.

Easy to push buttons are ergonomic and convenient to use. The last reading is saved until a new test is taken, which is another convenient feature if you want to compare results.

Rugged 11"H x 6"W x 1.5"D water resistant housing contains commercial grade technology sensor and requires 2 AAA batteries which come with the tester. Solaxx Salt Dip 2-in-1 digital pool tester also comes with a little sponge to keep moisture where the probe is as the probe needs to stay wet.

If you want one of the best electronic pool water testers, then look no further. This is a find choice for anyone!

Solaxx Salt Dip 2-in-1 Salt Water Electronic Water Tester

Things We Liked

  • ​Water resistant housing
  • ​Two test options
  • ​Large backlit easy to read display
  • ​Rugged and accurate
  • Last test saved a useful feature

Things We Didn't Like

  • The batteries included not the best quality so we suggest replacing them with a pair of branded reliable ones




Purchasing a good electronic pool tester kit isn't hard. Take our buying guide into account for the best pool test kits comparisons and take a look at one of our recommended products for almost a guaranteed good pick.

If you found these digital pool water tester reviews be sure to check out some of our other pool test kit reviews.

    Laurie S.

    As a multi home owner for 15 years I've tried out a ton of pool products and methods and have found out the best ones that work for me. I love helping out other people with real, honest advice and spending time with my family. If you have any questions please don't hesitate to contact me in the about or through a comment.

    Click Here to Leave a Comment Below

    Craig - April 19, 2019 Reply

    I m just trying to find a reliable cost effective way to test for salt levels twice a week, I would prefer a digital product because I have found test strips are very temperamental, thanks

    Debbie Knopf - May 12, 2019 Reply

    What’s the difference between the Lemotte ColorQ Pro 2056 vs 2057, besides the price?

      Laurie S. - May 13, 2019 Reply

      The 2057 is newer. You can go with the 2056 since you can actually test more with it. I haven’t heard that 2057 is any better than 2056

    Jim - June 4, 2019 Reply

    Regarding the LeMotte 2056 vs 2057, it looks like the answer to your question is simply the reagent being in liquid or tablet form. I had the same question so I looked at Walmart.com for their product descriptions and found:

    LaMotte ColorQ Pro 7 Digital Liquid Pool & Spa Chemical Water Testing Kit 2056
    “Each of the factors is a liquid test that require 5 drops of liquid reagent except cyanuric acid, which is a single tablet.”

    LaMotte 2057 ColorQ TesTabs Pro 7 Digital Pool & Spa Chemical Water Testing Kit
    “This kit includes 100 TesTabs tablet reagents for each test factor….”

    Hope this helps and is accurate info.

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