10 Best digital hot tub water testers of 2025

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Crystal Water Monitor

Crystal Smart Water Monitor for Chlorine & Bromine Pools, Hot Tubs & Swim Spas - 24/7 Continuous Digital Water Testing with App Notifications & Customized Chemical Dosing (New Model)

11% Off
9.8

Exceptional

Our Rating
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Value for Money

2

AIPER

AIPER HydroComm Smart Pool Monitor, 24/7 Digital Water Testing for Pools, Hot Tubs & Spas, 5-in-1 Accurate Testing, App Control, Customized Optimization Tips, White

30% Off
9.7

Exceptional

Our Rating
3

EASYTEST
EASYTEST 7-Way Pool Test Strips, 150 Strips Water Chemical Testing for Hot tub and Spa, Accurate Test Bromine, Total Alkalinity, pH, Free Chlorine, Total Hardness, Cyanuric Acid, and Total Chlorine
Main highlights

Accurate and Fast Testing
Soak for 1 second, get results in 15 seconds.

Ideal for Pools and Spas
Test Bromine, pH, Chlorine, Alkalinity, Hardness, Cyanuric Acid.

Reliability Praised by Customers
Matches professional readings, ensures clear pool and spa water.
Key specs
- Accuracy:High-quality fiber paper
- Test Parameters:Bromine, Alkalinity, pH, Chlorine
- Test Count:150 strips
- Color Chart:On the bottle
- Usage Instructions:Soak, hold, compare
9.6

Exceptional

Our Rating

8.7
Simple to use

8.0
clearly written

8.0
Precision
4

Hofun
Pool Salt Tester & PH Meter, Hofun Digital Salinity Meter and PH Tester for Aquarium and Pool Saltwater Water, 5 in 1 Salinity PH Temp EC and TDS Meter, Aquarium Swimming Pool Hot Tub, High Accuracy
Main highlights

5-in-1 Functionality
Combines salinity, pH, temperature, EC, and TDS testing in one device.

Versatile Applications
Ideal for testing pools, drinking water, aquariums, and hydroponics.

Ease of Use
Praised for its easy operation and quick, accurate measurements.
Key specs
- Display Type:PPM + PPT +
- Sensor Type:Titanium alloy probe
- Automatic Features:Auto change to ppt
- Measurement Range:0-9999ppm & 0-200ppt
- Multi-Functionality:Salinity, TDS, EC, pH, Temp
9.5

Excellent

Our Rating

9.7
Simple to use

9.5
clearly written

8.9
Precision
5

MAV AquaDoc
Digital Water Testing Kit - Digital Hot Tub Water Tester for Pool - Digital Chlorine Tester for Pool by AquaDoc with Water Analyzer and Test Strips
Main highlights

Accurate Digital Testing
Provides precise readings for seven key water parameters, enhancing pool and spa maintenance.

Ideal for Pool and Spa Owners
Perfect for those managing water chemistry in pools and hot tubs.

Praised for Ease of Use
Customers love its simplicity and effectiveness in providing reliable results.
9.4

Excellent

Our Rating
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6

dzdarren
Ph Tester Digital,Pool Salt Tester, Digital Salinity Meter and PH Tester for Pool Salt Water and Drinking Water, 5 in 1 Salinity PH Temp EC and TDS Meter for Swimming Pool Hot Tub Spas, High Accuracy
Main highlights

5 in 1 Functionality
Combines salinity, TDS, EC, pH, and temperature testing in one device.

Versatile Applications
Ideal for pools, aquariums, drinking water, hydroponics, and spas.

High Accuracy
Praised for precise and reliable readings matching other reference sources.
Key specs
- Display Type:Digital display
- Sensor Type:Titanium alloy probe
- Automatic Features:Automatic unit change
- Measurement Range:0-9999ppm & 0-200ppt
- Multi-Functionality:Salinity, TDS, EC, pH, Temperature
9.3

Excellent

Our Rating
7

JNW Direct
Hot Tub and Pool Test Strips - 6in1 Quick & Accurate Hot Tub, Spa, Pool Test Strips - 100 Water Test Strips, Water Test Kit with E-Book - Test Chlorine, Bromine, pH, Hardness, Alkalinity - JNW Direct
Main highlights

Affordable 6-in-1 Testing
Get 100 test strips for comprehensive pool and spa maintenance, testing for Hardness, Chlorine, Bromine, Free Chlorine, pH, and Alkalinity.

Quick and Easy Use
Ideal for regular pool and spa maintenance, providing results in seconds with a simple dip-and-read method.

Accuracy Praised by Users
Customers appreciate the strips' accuracy, matching results from professional pool store tests.
Key specs
- Accuracy:Highly accurate
- Test Parameters:Hardness, Chlorine, Bromine, pH, Alkalinity
- Test Count:100 strips
- Color Chart:On bottle
- Usage Instructions:Dip, hold, compare
9.2

Excellent

Our Rating

9.1
Simple to use

8.9
worth the money

8.4
clearly written
8

YINMIK
YINMIK pH Meter, Digital pH Tester for Hydroponics, pH Temp Meter with Horizontal Display for Pool, Spa, Hot Tub, Indoor Plants, Koi Ponds, Drinking Water, Wine Beer Making, Aquarium, Aquaculture
Main highlights

Large Horizontal Screen Display
The YINMIK YK-P01 pH meter offers a large horizontal screen for simultaneous pH and temperature readings, enhancing ease of use.

Versatile Use Across Applications
Ideal for testing pH in pools, spas, aquariums, hydroponics, and brewing, ensuring versatile use in various environments.

Highly Accurate Readings
Customers praise the YK-P01 for its accurate readings comparable to higher-priced models, with effective automatic temperature compensation.
Key specs
- Temperature Compensation:Effective ATC
- Display Type:Large Horizontal Screen
- Functionality:pH and temperature reading
- Power Source:3 LR44 batteries
- Size:8.39 x 3.03 x 1.57 inches
8.9

Very Good

Our Rating

9.5
Simple to use

9.3
Precision

8.0
Battery Duration
9

Pious
Pious PH Tester Digital, 5 in 1 PH Meter for Water/Salinity Meter/tds/ec/Thermometer, Pool Salt Tester with Constant Temperature Compensation, Suitable for Drinking Water Swimming Pools Aquariums
Main highlights

Versatile Water Quality Measurement
The device measures pH, salinity, EC, TDS, and temperature with ease.

Ideal for Diverse Water Testing Needs
Perfect for swimming pools, aquariums, hot tubs, and hydroponics.

User-Friendly Calibration and Operation
Factory-calibrated with easy 3-point calibration and intuitive controls.
8.6

Very Good

Our Rating
10

Benicci

7-in-1 Accurate Pool Test Strips - 150 Hot Tub Spa Test Strips - Quick Pool Water Testing Kit - Bromine, pH, Hardness, Alkalinity, Chlorine & Cyanuric Acid - Perfect for Any Pools, Spa, Hot tubs
8.4

Good

Our Rating

10 Best digital hot tub water testers of 2025

1

Crystal Smart Water Monitor for Chlorine & Bromine Pools, Hot Tubs & Swim Spas - 24/7 Continuous Digital Water Testing with App Notifications & Customized Chemical Dosing (New Model)

How do we rank?

How do we rank?

Analyzing top stores

2

AIPER HydroComm Smart Pool Monitor, 24/7 Digital Water Testing for Pools, Hot Tubs & Spas, 5-in-1 Accurate Testing, App Control, Customized Optimization Tips, White

3

EASYTEST 7-Way Pool Test Strips, 150 Strips Water Chemical Testing for Hot tub and Spa, Accurate Test Bromine, Total Alkalinity, pH, Free Chlorine, Total Hardness, Cyanuric Acid, and Total Chlorine

8.7

8.0

8.0

4

Pool Salt Tester & PH Meter, Hofun Digital Salinity Meter and PH Tester for Aquarium and Pool Saltwater Water, 5 in 1 Salinity PH Temp EC and TDS Meter, Aquarium Swimming Pool Hot Tub, High Accuracy

9.7

9.5

8.9

5

Digital Water Testing Kit - Digital Hot Tub Water Tester for Pool - Digital Chlorine Tester for Pool by AquaDoc with Water Analyzer and Test Strips

6

Ph Tester Digital,Pool Salt Tester, Digital Salinity Meter and PH Tester for Pool Salt Water and Drinking Water, 5 in 1 Salinity PH Temp EC and TDS Meter for Swimming Pool Hot Tub Spas, High Accuracy

7

Hot Tub and Pool Test Strips - 6in1 Quick & Accurate Hot Tub, Spa, Pool Test Strips - 100 Water Test Strips, Water Test Kit with E-Book - Test Chlorine, Bromine, pH, Hardness, Alkalinity - JNW Direct

9.1

8.9

8.4

8

YINMIK pH Meter, Digital pH Tester for Hydroponics, pH Temp Meter with Horizontal Display for Pool, Spa, Hot Tub, Indoor Plants, Koi Ponds, Drinking Water, Wine Beer Making, Aquarium, Aquaculture

9.5

9.3

8.0

9

Pious PH Tester Digital, 5 in 1 PH Meter for Water/Salinity Meter/tds/ec/Thermometer, Pool Salt Tester with Constant Temperature Compensation, Suitable for Drinking Water Swimming Pools Aquariums

10

7-in-1 Accurate Pool Test Strips - 150 Hot Tub Spa Test Strips - Quick Pool Water Testing Kit - Bromine, pH, Hardness, Alkalinity, Chlorine & Cyanuric Acid - Perfect for Any Pools, Spa, Hot tubs

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