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Best AQUARIUM DIGITAL TDS WATER QUALITY TESTERS

At Aquarium Accessories Reviews, we take pride in our rigorous review process. Each product is handpicked based on market research, personally tested by our experienced team for functionality and durability, and evaluated for value for money. Alongside our hands-on experience, we also consider real user feedback. This meticulous approach ensures we provide honest, transparent, and comprehensive reviews to guide your aquarium accessory purchases.

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Hofun TDS Meter, 3 in 1 TDS, EC & Temperature Meter, Accurate & Reliable PPM Meter, Digital Water Testing kits for Drinking Water Quality, Tap, Well, Swimming Pool, Aquarium, RO/DI System, Hydroponics

Hofun Store

4.5
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TDS Meter Digital Water Tester - ppm Meter, EC & Temperature Test Pen 3-in-1 | Easy to Use Water Quality Tester | Ideal for Testing RO Drinking Water Hydroponics Aquarium Swimming Pool & More (Green)

Health Metric Store

4.4
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TDS Meter Digital Water Tester,WoEluone 3 in 1 TDS,Temperature and EC Meter,Accurate Ideal PPM Meter for Drinking Water, Aquariums,RO System and More

WoEluone Store

4.4
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iPstyle Digital TDS Meter Water Tester, PPM Water Quality Tester Measuring Range 0-9999ppm, Ideal for Drinking Water, Swimming Pool, Aquariums, Hydroponics (Grey) (TDS)

iPstyle Store

4.3
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RCYAGO 6 in 1 pH/RH/EC/CF/TDS(PPM)/Temperature Rechargeable Multi-Parameter Wall-Mount Water Quality Tester

RCYAGO Store

3.5
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TDS Meter Water Quality Tester,HASFINE Digital Conductivity Meter 3 in 1 TDS,EC and Temperature Meter, Accuracy Testing Pen 0-9999 PPM Meter for Drinking Water, Aquariums,Pool and More

HASFINE Store

4.4
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AquaticLife TDS Meter Digital Water Quality Tester for RO-RODI System Drinking Water, Aquariums, Hydroponics, 0-999 ppm Measuring Range, 1 ppm Increments, 2% Readout Accuracy

Aquatic Life Store

4.2
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PH and TDS Meter Combo, Tuecota Digital ph Water Tester, 3-in-1 TDS Temperature & EC Meter, Digital Water Tester, Ultrahigh Accuracy Water Quality Tester for Drinking Water, Hydroponics, Aquarium etc

Brand: Tuecota

4
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GuDoQi Digital PH Meter, 5 in 1 Water Quality Tester with Backlight, PH/TDS/EC/Salinity/Temp Meter with ATC, 0.01 Resolution High Accuracy Pen Type Tester, for Aquarium, Spas, Drinking Water

GuDoQi Store

3.9

We will continue to update this buyer's guide once a month or two.

The best AQUARIUM DIGITAL TDS WATER QUALITY TESTERS in 2024 - Detailed Product Descriptions

1. Hofun TDS Meter, 3 in 1 TDS, EC & Temperature Meter, Accurate & Reliable PPM Meter, Digital Water Testing kits for Drinking Water Quality, Tap, Well, Swimming Pool, Aquarium, RO/DI System, Hydroponics

By Hofun Store

Hofun TDS Meter, 3 in 1 TDS, EC & Temperature Meter, Accurate & Reliable PPM Meter, Digital Water Testing kits for Drinking Water Quality, Tap, Well, Swimming Pool, Aquarium, RO/DI System, Hydroponics

✔[ RELIABLE TDS METER WITH ACCURATE & QUICK MEASUREMENT ] Hofun ppm water tester is equipped with premium quality titanium alloy probe, which enables quick and convenient water total dissolved solids(tds) test. 0-9999ppm wide test range makes it fits multiple uses, like drinking water test, swimming pool, hot tub, laboratory, hydroponics, aquariums, well water, tap water, etc.
✔[ BONUS 3 in 1 TDS , EC & TEMP METER ] Hofun 3 in 1 TDS Meter, Electric Conductivity Meter & Temperature Meter features the most updated technology. Three different measurement needs can be fulfilled by one water tester meter. Not only been convenient for you, but also saves your time and money, absolutely a helpful water test kit for your water safety at home.
✔[ EASY READING BIG BACKLIT LCD DISPLAY & QUALIFIED WATER TELLER ] Hofun water hardness test meter with Big Backlit LCD is far superior than most digital water quality tester display, which allows wider angles of data reading and night reading. Besides, Red backlight ( ppm figure over 40 ) means non-drinking water. Green backlight ( ppm figure below 40 ) indicates TDS figure qualified for direct drinking water (Notes: International standard adopted TDS figure 40 as a dividing line.)
✔[ EASY OPERATION & ENERGY SAVING ] Hofun ppm meter allows one button operation, just turn it on and put tds meter into water, you can get stable and accurate data in seconds. Besides, there is a reference chart at the back of this test meter for tds figure explanation.

2. TDS Meter Digital Water Tester - ppm Meter, EC & Temperature Test Pen 3-in-1 | Easy to Use Water Quality Tester | Ideal for Testing RO Drinking Water Hydroponics Aquarium Swimming Pool & More (Green)

By Health Metric Store

TDS Meter Digital Water Tester - ppm Meter, EC & Temperature Test Pen 3-in-1 | Easy to Use Water Quality Tester | Ideal for Testing RO Drinking Water Hydroponics Aquarium Swimming Pool & More (Green)

✅ OUR SIMPLEST, FASTEST TDS METER YET - Just dip in the meter, stir, and get your results in seconds. No calibration or setup needed, you can use it straight out of the box. Follow the step-by-step instructions then check the easy-to-read screen.
✅ UPGRADED ACCURACY THAT LASTS - With the titanium alloy probe and the latest sensors, you can get almost exact readings every time. What’s more, the meter can be easily recalibrated for extended precision whenever needed.
✅ SUITABLE FOR ANY TYPE OF TDS OR EC TESTING - Check the TDS or EC of your aquarium, pool, or any water source. You can determine the effectiveness of your RO, DI, or distillation unit, check the nutrient levels of your hydroponic setup, and more.
✅ RESULTS YOU CAN UNDERSTAND - Your free (opt-in only) emailed user guide explains exactly what the results mean, and what you may want to do about them. If you have any questions, just ask our team of EPA water quality experts. We’re here to help!
✅ SAVE THE MONEY AND HASSLE - Instead of forking out for an expensive lab test or professional equipment, you can get reliable results from home. This ppm meter can also be taken anywhere with you in the free leather case, ready to test on the go.

3. TDS Meter Digital Water Tester,WoEluone 3 in 1 TDS,Temperature and EC Meter,Accurate Ideal PPM Meter for Drinking Water, Aquariums,RO System and More

By WoEluone Store

TDS Meter Digital Water Tester,WoEluone 3 in 1 TDS,Temperature and EC Meter,Accurate Ideal PPM Meter for Drinking Water, Aquariums,RO System and More

【 Upgrade LCD BACKLIGHT】Our water meter equipped with low-power backlight technology to test water at night or in dark places easily. It can also be used to distinguish between drinking water and non-drinking water. Red backlight(ppm>40) means this is non-drinking water.
【 ACCURATE AND WIDE MEASUREMENT RANGE】: The advanced 3 in1 (TDS, EC, Temperature) conductivity pen equipped with premium quality titanium alloy probe to achieve high accuracy, and reliable Automatic Temperature Compensation (ATC) ensures reading always be accurate at various temperatures. Testing range from 0-9990 ppm, the resolution is in increments of 1ppm,indicated by a blinking 'x10' image.
【AUTO-OFF AND HOLD FUNCTION】: This water TDS tester shuts off automatically after 2 minutes of non-use to conserve the batteries.Features a hold function that saves measurements for convenient reading and recording.
【 EASY TO USE AND ACCURATE】: Just stick the TDS meter tester into the water of 1 inch deep, then stabilized readings will be auto-locked on LCD backlight screen in seconds.Besides, there is a reference chart at the back of this water tester for tds figure explanation.
【WHAT YOU GET】: 1 TDS water tester, 1 user manual, 1 preinstalled battery,1 leater carrying case with belt, and our friendly customer service, any problems, please feel free to contact us, we will offer you a best soltion within 24 hours.

4. iPstyle Digital TDS Meter Water Tester, PPM Water Quality Tester Measuring Range 0-9999ppm, Ideal for Drinking Water, Swimming Pool, Aquariums, Hydroponics (Grey) (TDS)

By iPstyle Store

iPstyle Digital TDS Meter Water Tester, PPM Water Quality Tester Measuring Range 0-9999ppm, Ideal for Drinking Water, Swimming Pool, Aquariums, Hydroponics (Grey) (TDS)

MULTIFUNCTIONAL AND UPGRADED: TDS Meter, EC Meter and Temperature Meter 3 in 1, Upgraded with big backlit LCD for easier reading, and auto-lock function for easier use.
ACCURATE AND RELIABLE: To achieve high accuracy, equipped with premium quality titanium alloy probe, and reliable Automatic Temperature Compensation (ATC) ensures reading always be accurate at various temperatures.
AUTO-OFF AND HOLD FUNCTION: The electrical conductivity meter shuts off automatically after 2 minutes of non-use to conserve batteries. Hold function ensures to save measurements for convenient reading and recording
SUITABLE FOR ANY TYPE OF TDS OR EC TESTING - Check the TDS or EC of your aquarium, pool, or any water source. You can determine the effectiveness of your RO, DI, or distillation unit, check the nutrient levels of your hydroponic setup, and more.
MEASUREMENT RANGE: From 0-999 ppm, with a resolution of 1 ppm. From 1,000 to 9,9990, the resolution is 10ppm, indicated by blinking “x 10” symbol. It works at 0 - 60 Deg.C

5. RCYAGO 6 in 1 pH/RH/EC/CF/TDS(PPM)/Temperature Rechargeable Multi-Parameter Wall-Mount Water Quality Tester

By RCYAGO Store

RCYAGO 6 in 1 pH/RH/EC/CF/TDS(PPM)/Temperature Rechargeable Multi-Parameter Wall-Mount Water Quality Tester

Measurement Range: pH: 0.00~14.00pH; TDS: 10~19990ppm; EC: 0.00~19.99EC; CF: 0.0~199.9CF; RH: 10%RH ~ 99%RH; Temp: 0~55°C (32~131°F).
Digital water quality tester widely used to measure the pH/RH/Conductivity EC/CF/TDS(PPM)/Temperature of water. Clear LCD with backlight, 3 results displayed simultaneously. Can online monitoring for a long time. PH electrode We use the international common BNC-Q9 plug, pH probe can be replaced.
Before the calibration, please turn it off and fully charge. If you need to calibrate, please refer to the instruction manual. Easy calibration of pH and TDS with just a mini-screwdriver. Can work continuously for more than 10 hours of a power outage or outdoor without power after charging the battery for 3 hours.
Test temperature in ℃ / ℉(switchable unit). Automatic temperature compensation. Imported IC and high-cost performance. pH calibration powders and EC calibration solution are included in the set. Calibrates easily and offers safer and precise measurements. Each set of products has passed the calibration liquid test function qualified before shipment.
Digital pH Meter Apply in water sources, aquarium, hydroponics, laboratory, spas, swimming pools, and other water systems. Easy to use and provides an instant display of results.

6. TDS Meter Water Quality Tester,HASFINE Digital Conductivity Meter 3 in 1 TDS,EC and Temperature Meter, Accuracy Testing Pen 0-9999 PPM Meter for Drinking Water, Aquariums,Pool and More

By HASFINE Store

TDS Meter Water Quality Tester,HASFINE Digital Conductivity Meter 3 in 1 TDS,EC and Temperature Meter, Accuracy Testing Pen 0-9999 PPM Meter for Drinking Water, Aquariums,Pool and More

✅【TEST YOUR WATER PURITY】: With our handy TDS water meters can test how pure is your water? Just stick it in about 1 inch deep of water, then TDS water tester can tell you your overall water purity level, which will be displayed on the screen in ppm (parts per million).
✅【 4 IN 1 MODEL FUNCTION】: Our advanced 3 in 1 ppm meter conductivity pen professional in TDS, EC and Temperature testing, 4 in 1 model for your free choice. And upgraded with big backlit LCD for easy reading, easily use with auto lock function.
✅【 ACCURATE AND WIDE MEASUREMENT RANGE】: Equipped with premium quality titanium alloy probe to achieve high accuracy, and reliable Automatic Temperature Compensation (ATC) ensures reading always be accurate at various temperatures. Testing range from 1000 to 9990 ppm, the resolution is in increments of 10 ppm, indicated by a blinking 'x10' image.
✅【 EASY TO USE AND HANDY】: Just remove the protective cap, press ON/OFF button, then stick the TDS meter tester into the water ( no more than 4 cm), waiting until the display stabilizes, the TDS meter will be auto-locked on LCD backlight screen in seconds, TDS tester shuts off automatically after 2 minutes of non-use to conserve batteries. Features a hold function that saves measurements for convenient reading and recording.
✅【FAN-FAVORITE CUSTOMER SERVICE】: For any problems with our digital TDS water tester meter, please feel free to contact us, we will give you a perfect solutions within 24 hours.

7. AquaticLife TDS Meter Digital Water Quality Tester for RO-RODI System Drinking Water, Aquariums, Hydroponics, 0-999 ppm Measuring Range, 1 ppm Increments, 2% Readout Accuracy

By Aquatic Life Store

AquaticLife TDS Meter Digital Water Quality Tester for RO-RODI System Drinking Water, Aquariums, Hydroponics, 0-999 ppm Measuring Range, 1 ppm Increments, 2% Readout Accuracy

TDS METER DIGITAL TESTER – The handheld TDS meter digital water tester allows you to accurately measure the Total Dissolved Solids in water. Ideal for portability, you can carry this TDS tester conveniently.
IDEAL FOR TESTING WATER QUALITY – Test the water quality from multiple sources. Use this TDS meter for RO/RODI system drinking water, aquariums, hydroponics, and more.
PROVIDES HIGHLY ACCURATE READINGS – This TDS water quality tester provides highly accurate readings. Its hold function saves measurement for convenient readings and recording.
1000 HOURS OF USAGE – The battery of this TDS measure test pen provides approximately 1000 hours of usage. An auto-off function saves battery life by turning off automatically after 5 minutes of non-usage.
EASY TO READ DISPLAY – A large, easy-to-read LCD screen display on this TDS water testing meter makes it easy to see results. Its power source is 2 x 1.5V included button cell batteries (LR44 size).

8. PH and TDS Meter Combo, Tuecota Digital ph Water Tester, 3-in-1 TDS Temperature & EC Meter, Digital Water Tester, Ultrahigh Accuracy Water Quality Tester for Drinking Water, Hydroponics, Aquarium etc

By Brand: Tuecota

PH and TDS Meter Combo, Tuecota Digital ph Water Tester, 3-in-1 TDS Temperature & EC Meter, Digital Water Tester, Ultrahigh Accuracy Water Quality Tester for Drinking Water, Hydroponics, Aquarium etc

【Quick and Accurate】: PH Meter and TDS Meter, respectively adopt low impedance sensitive bulb and agile titanium alloy electrode respectively. Remove the protective cover, press the switch button, immerse the probe of the pH Meter/TDS Meter in the solution, and you can get the reading immediately.
【pH Meter】: The digital ph tester has automatic temperature compensation function and Automatic Calibration function, make the measurement data not affected by the water temperature, and make it easy for you to calibrate.
【TDS & EC Meter】: The Digital TDS & EC Tester has automatic temperature compensation function, Auto-off and Hold Function. The digital water tester shuts off automatically after 2 minutes of non-use to conserve batteries. Features a hold function that saves measurements for convenient reading and recording.
【Wide Use】: The lightweight and portable size of the water meter Combo allows you to easily carry it with you, and measure it anytime, anywhere. Test the purity of drinking water to ensure it's healthy, monitor if Reverse Osmosis (RO)/DI System works properly, whether filter need replaced, maintenance aquarium, hydroponics(test nutrients) and pool etc. It is very suitable for scientific experiments in children's schools, testing different bottled water.
【What You Will Get】: 1 x pH meter, 1 x TDS & EC Meter, 3 x pH buffer powder, 2 x 1.5V LR44 battery (built-in), 1 x CR2032 battery (built-in), 3 years warranty service. Additional gift: 2 x 1.5V LR44 battery, 1 x CR2032 battery spare for you, so that the original battery is exhausted and there is no need to buy a new battery, everything is for the customer. If you have any questions, please feel free to contact us, we will solve it for you within 24 hours.

9. GuDoQi Digital PH Meter, 5 in 1 Water Quality Tester with Backlight, PH/TDS/EC/Salinity/Temp Meter with ATC, 0.01 Resolution High Accuracy Pen Type Tester, for Aquarium, Spas, Drinking Water

By GuDoQi Store

GuDoQi Digital PH Meter, 5 in 1 Water Quality Tester with Backlight, PH/TDS/EC/Salinity/Temp Meter with ATC, 0.01 Resolution High Accuracy Pen Type Tester, for Aquarium, Spas, Drinking Water

【Easy to Use】Press the power button to turn on. Tap "HOLD" to lock the value, long press "HOLD" to switch the temperature unit. Tap "MODE" to switch between different functions.
【5 in 1 Function】This is a water test kit with Ph meter, TDS meter, and EC salinity temperature test function. The backlit LCD display makes it easy to read the displayed values.
【Wide Use】 Ideal for household or laboratory use. Suitable for testing pH balance of drinking water, pool, aquarium, RO system, Spa, or hydroponics.
【Absolute precision】PH resolution is 0.01pH, accuracy ±0.05pH. TDS meter resolution 1ppm 0.1ppt, accuracy ±2%. Conductivity resolution 1uS/cm 0.1mS/CM, accuracy ±2%. Thermometer resolution 0.1℃/℉, accuracy ±0.5℃. Salinity resolution 0.01%, accuracy 0.01-5.00%(±0.1%) 5.10-25.00%(±1%)
【Robust and Durable】This water quality tester is IP67 waterproof, so it can continue to be used even if it falls into the fish tank. If you have any questions, please feel free to contact us, we will be happy to solve your problems.

author img Lucas Carter

Our Editor-in-Chief, Lucas Carter, brings over twenty years of hands-on experience in the world of aquaristics. He is not just an expert in aquarium keeping but also a passionate advocate for the hobby. Lucas's extensive knowledge of aquarium accessories, understanding of different aquatic ecosystems, and a keen eye for product quality set the standard for our reviews. His personal commitment is to guide both novice and experienced aquarium enthusiasts through the vast ocean of products, helping them create the ideal environment for their aquatic friends.