Best Hot Tub Monitoring System

Peter | 26-12-2025

With so many Best Hot Tub Monitoring System brands on the market – from big names like Crystal Water Monitor,FreshWater,GoveeLife,iopool,Terronix,FROG to smaller companies – finding the right product can be a real challenge. But we’re here to make your search easier.

We carefully researched and tested a vast range of Best Hot Tub Monitoring System to help you discover the top contenders that match different needs and preferences. Altogether, we spent over 100 hours evaluating numerous products first-hand.

Our #1 best Best Hot Tub Monitoring System is Crystal Water Monitor Best Hot Tub Monitoring System, based on its stellar performance across all our tests. Below you’ll find more of our top-rated recommendations for great Best Hot Tub Monitoring System options currently available. Make sure to check out our buying guide too – it’s full of expert advice for choosing a Best Hot Tub Monitoring System tailored to exactly what you’re looking for. With our help guiding your decision, finding your perfect fit will be a breeze!

Editor's Choice
Crystal Smart Water Monitor for Chlorine & Bromine Pools, Hot Tubs & Swim Spas - 24/7 Continuous
Crystal Smart Water Monitor for Chlorine & Bromine Pools, Hot Tubs & Swim Spas - 24/7 Continuous
Premium Pick
FreshWater Smart Monitoring Sensor - Smart Water Monitor for Spas & Hot Tubs - Smart Monitoring
FreshWater Smart Monitoring Sensor - Smart Water Monitor for Spas & Hot Tubs - Smart Monitoring
Budget Pick
GoveeLife Smart Pool Thermometer with WiFi Gateway, Digital Swimming Water Thermometer Temperature
GoveeLife Smart Pool Thermometer with WiFi Gateway, Digital Swimming Water Thermometer Temperature

Top 10 Best Hot Tub Monitoring System

We researched and compared the top products in the Best Hot Tub Monitoring System category to provide you with these recommendations.

1. Crystal Smart Water Monitor for Chlorine & Bromine Pools, Hot Tubs & Swim Spas - 24/7 Continuous

Crystal Smart Water Monitor for Chlorine & Bromine Pools, Hot Tubs & Swim Spas - 24/7 Continuous
9.8

Crystal Water Monitor

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  • SIMPLIFIED POOL & HOT TUB CARE: The Crystal Smart Water Monitor actively tests your pool or hot tub's water 1,000 times per week to give you personalized chemical recommendations that are much more reliable than any single point-in-time sample of water or a test strip reading. It's as simple as monitor, notify, and adjust.
  • AUTOMATIC NOTIFICATIONS: The Crystal Water Monitor app automatically alerts you when you need to adjust your chemicals and provides precise chemical dosing recommendations customized for your pool or hot tub. Works with both Android and iOS.
  • TAKES GUESSWORK OUT OF ADDING CHEMICALS: Scan your chemicals barcode once, and the Crystal Water Monitor app will customize your chemical dosing recommendations for your preferred chemical brand. Supports all major chemical brands.
  • SUPPORTS CHLORINE & BROMINE WATER TYPES: Works with chlorine and bromine pools, hot tubs and swim spas. Saltwater version also available.
  • THE CRYSTAL CLEAR CHOICE: While other smart monitors only sample your water once a day, Crystal continuously monitors it 144x a day providing the most accurate readings and dosing recommendations. Enjoy the freedom to use any of your preferred chemical brands instead of being forced to use proprietary ones. Say goodbye to expensive monthly replacement cartridge purchases competitive monitors require. Upgrade from confusing and inaccurate test strips with precise digital testing and save time constantly taking individual water samples to your pool store.
  • RELIABLE SERVICE & SUPPORT: Complimentary first-year service and US based customer support with your Crystal Water Monitor. Renew for $99/year thereafter to continue to receive ongoing notifications, chemical dosing, service, support, and free replacement parts.

2. FreshWater Smart Monitoring Sensor - Smart Water Monitor for Spas & Hot Tubs - Smart Monitoring

FreshWater Smart Monitoring Sensor - Smart Water Monitor for Spas & Hot Tubs - Smart Monitoring
9.5

Freshwater

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  • Soft & Natural-Feeling Water: This FreshWater IQ water monitoring sensor is designed to help you maintain clean, natural-feeling water in your hot tub with minimal effort, so you can spend less time monitoring and more time relaxing
  • Effortless Smart Water Management: Maintain clean water with automated monitoring for your spa that regularly tests your water and indicates when adjustments are needed for pH, chlorine, and salt levels
  • Hourly Water Testing: The water health monitoring system tests your water every hour through a reliable water monitor that helps you maintain balanced spa water
  • Water Treatment Made Easy: This salt system smart monitoring system takes the guesswork out of water care; the easy-to-follow on-screen recommendations help you maintain natural-feeling water
  • For Hot Spring & Caldera Spas: This salt system Smart Monitoring Sensor is designed for Hot Spring Highlife and Limelight spas as well as Caldera hot tubs, making it easy to integrate this sensor into your freshwater salt system setup

3. GoveeLife Smart Pool Thermometer with WiFi Gateway, Digital Swimming Water Thermometer Temperature

GoveeLife Smart Pool Thermometer with WiFi Gateway, Digital Swimming Water Thermometer Temperature
9.1

Goveelife

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  • Smart Remote Monitoring: With a connected 433 gateway (up to 328ft /100m), you can easily monitor your water temperature data in real time from anywhere with the App. The Wi-Fi gateway can be paired with up to 10 sensors.
  • More Accurate: The pool thermometer sensor can detect temperatures ranging from -4F to 158F, can accurately detect the temperature change of 0.9F, refresh speed up to 2S, double-click the internal button to switch F/C.
  • IPX7 Waterproof Protection: The GoveeLife Pool Thermometer is waterproof and can accurately measure temperature even when entering the water. You don't have to worry about water damaging it at all.
  • Free Date Storage & Export: The GoveeLife pool temperature monitor supports online viewing of 20-day data graphs and export of data recorded over the past 2 years. Ideal for swimming pools, paddling pools, hot tubs, fish ponds, jacuzzis, spas, etc.
  • Long-Lasting: The pool thermometer is powered by 2 AAA batteries, divided into standard mode and powersaving mode. Battery life is 1 year in standard mode and 3 years in powersaving mode (APP setting). When the battery is low, an alert icon appears on the screen and the app will also send a low battery notification. The product can also be linked to GoveeLife's wallsocket products to automatically turn the pool heat on and off.
  • Easy to Use and Install: The GoveeLife Pool Thermometer also comes with a rope to prevent the pool thermometer from floating away while taking readings! Need attention: The included orange loop rubber is replaceable to make the pool thermometer stand out on the water!
  • Need attention: It is better not to have obstacles between the gateway and the sub-device, otherwise it may affect the stability of signal transmission.(2.4Ghz WiFi Only)

4. iopool Smart Water Monitor - Works for Chlorine & Bromine Pools, Hot Tubs, & Swim Spas - Gives

  • Compatible with Chlorine, Bromine and Active Oxygen
  • Not Compatible with Salt water
  • Real-time analysis of your pool water. iopool advises you on the precise treatments to be carried out to have a safe and clear water continuously.
  • Guided pool care: iopool guides you through all the steps of the maintenance process to ensure safe and clear water for you and your family. You can also receive personalized alerts based on the actions to be taken.
  • App: Get access to the evolution of your water over time through the history feature. Share the iopool app with your neighbor when you are on vacation!
  • Eco Start pack: EcO probe + Bluetooth Wi-Fi Gateway + Unlimited and complete access to the app for life

5. Digital Pool Water Tester, 7-in-1 Smart Floating Meter, WiFi Enabled, Tests pH, Chlorine, Salinity,

Digital Pool Water Tester, 7-in-1 Smart Floating Meter, WiFi Enabled, Tests pH, Chlorine, Salinity,
8.7

Terronix

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  • 7-in-1 Multi-Parameter Water Testing: Accurately measures pH, TDS, EC, free chlorine (CL), ORP, salinity (SALT), and water temperatureall with a single smart device. Perfect for maintaining balanced water in residential pools, spas, hot tubs, and saltwater systems.
  • Real-Time Data Sync with Mobile App: Connect to the Tuya mobile app via WiFi to monitor your pools water quality in real-time. Receive instant alerts when readings are outside of your set range, ensuring you can act quickly to maintain ideal water conditions.
  • Simple Setup & Continuous Monitoring: Enjoy hassle-free setupjust long-press to pair the device with your app. Its floating, waterproof design allows for hands-free, ongoing water quality monitoring on your pool, hot tub, or spa surface.
  • Solar-Powered & USB Charging Support: Powered by an eco-friendly solar panel, the unit stays charged on sunny days. A USB backup charging port ensures you never run out of power, giving you flexibility for extended use and reliability in all conditions.
  • Family & Service Team Sharing: Multi-user functionality enables family members or pool service professionals to access water quality data simultaneously. Ideal for pool owners seeking efficient, easy-to-manage water care, ensuring a safe swimming environment at all times. Important: Before placing the device in water, ensure the USB port and power knob are tightly sealed to prevent water damage. Double-check the seals before each use to maintain the unit's safe and reliable performance.

6. FROG @Ease Test Strips for Hot Tubs and Swim Spas - Test Strip with Out Indicator for FROG @Ease

  • Compatible with FROG @ease Systems: FROG @ease Test Strips are only compatible with FROG @ease sanitizing systems; works for both hot tubs and swim spas
  • Unique SmartChlor Test Kit: FROG @ease Test Strips are specially designed to test for SmartChlor and are much easier to use than other test strips; one color match shows when the FROG @ease SmartChlor Cartridge needs to be replaced
  • Test Strips for Home Spa: In seconds, you can know whether your Total Alkalinity, pH, and Total Hardness are within ideal guidelines; dip the test strip, remove, and hold it next to the color chart
  • Essential FROG @ease Test Kit: Each bottle contains 30 test strips; recommended to test at least once per week to ensure water is properly balanced
  • Water Care Expertise: FROG has more than 25 years of experience making water care easier & keeping pool, hot tub and swim spa water sanitized; FROGs patented Mineral Technology and prefilled cartridges create cleaner, clearer, softer water

7. Yewhick Smart Pool Monitor with Gateway, Profession Salt Water Pool Testing kit for Swimming Pool, 7

Yewhick Smart Pool Monitor with Gateway, Profession Salt Water Pool Testing kit for Swimming Pool, 7
8.3

Yewhick

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  • Comprehensive 7-in-1 Smart Pool Monitor: Equipped with an advanced detection head, the Yewhick digital pool water tester measurements of chlorine ,pH, SALT, ORP, EC, TDS, and temperature. This all-in-one solution ensures a safer, healthier, and perfectly balanced pool. We have also thoughtfully prepared a gateway for you, so that you can be the first to pair wifi, and quickly enjoy the intelligent pool value detection.
  • Salt Tester for Saltwater Pool - Yewhick salinity Monitor can help check the salt level (Ideal level: 2700-3400 ppm) of the saltwater pool and hot tub with salt chlorinator system. Help the salt chlorinator work more efficiently in the appropriate salinity value.The Yewhick salt meter can help you keep your pool clean and avoid the negative effects of too much or too little salt on your body and pool equipment.
  • Free Chlorine Monitor for Pool: The Yewhick digital chlorine Tester can quickly help you monitor the concentration of free chlorine ions in your swimming pool. For most pools, the free chlorine concentration range is usually between 1-3 ppm. This effectively purifies the water while keeping it clear and transparent, making the pool look more appealing and swimmers able to enjoy a healthy and pleasant swimming experience.
  • Real-Time Smart pool chemical Monitoring : Wireless connection with your smartphone via the free Tuya App. Instantly access real-time pool data anytime and anywhere, ensuring convenient water quality monitoring. Supports solar and USB charging, ensuring reliable performance outdoors. The floating design makes it easy to use in any pool, and it supports 2.4GHz WiFi. Simple app calibration ensures accurate results.
  • More Accurate Digital pH Monitor: With the latest chips and algorithms, you can get faster readings and more stable results. Maintaining the proper pH level is critical to the operation and maintenance of saltwater pools, and our pH meter can help you check the pH level of your pool regularly. Typically, the ideal pH range is between 7.2 and 7.8
  • Pool Chlorine Monitor VS Pool Test Strips - When testing with test strips, you have to guess the value of your pool based on the color of the strips; however, free chlorine meter are simpler, more accurate, and friendlier to color-insensitive users than test strips. Simply place it in the water for a few seconds to get an accurate reading, plus, using enough test strips adds to the cost in the long run.

8. Pawfly 7 in 1 Digital Water Testing Kit, 50 Strips Hot Tub Test Kit, Digital Pool Water Tester for

  • 7-in-1 Test Kit: Accurately analyze 7 water parameters in one device pH, total hardness (TH), total chlorine (TCL), free chlorine (FCL), total alkalinity (Alk), cyanuric acid (CyA), and bromine (Br). Keep water safe for swimming, soaking, or drinking
  • High Accuracy: Precise test ranges: pH: 6.2-8.4; TH: 100-500 ppm; TCL: 0-10 ppm; FCL: 0-10 ppm; Alk: 40-180 ppm; CyA: 30-150 ppm; Br: 0-20 ppm. This digital pool test kit detects minute water changes before they become problems. No more guesswork needed
  • Warm Tips: US standard pool water ranges fall within the test ranges above. Test with confidence! If any parameter exceeds the testing range, the maximum value will be displayed; if below, the minimum value appears thats time to treat your pool water
  • Easy to Use: Instant testing without any hassle! Immerse a test strip in the water for 2 seconds, press the ok button on the tester, wait for the countdown to reach 0, shake off the excess water from the strip, insert it, and get your results in seconds
  • Regular Test: Equipped with 50 test strips, the digital pool water tester ensures consistent water monitoring throughout the season. Up to 100 test records can be saved for quick comparison. Effectively guarantee your water stays perfectly balanced
  • Wide Application: Master water testing anywhere swimming pools, hot tubs, spas, and more. Whether residential or commercial systems, the digital water testing kit rises to meet every challenge (NOTE: Not applicable to tap water, drinking water, etc.).
  • Professional & Handy: Forget fumbling with color matching! This digital hot tub water tester provides clear numerical readouts and foolproof operation. Powered by 3 AA batteries (Not Included), its portable and ready to use wherever you need it

9. GoveeLife Smart Pool Bath Thermometer Wireless App Easy Read, WiFi Digital Pool Thermometer Floating

GoveeLife Smart Pool Bath Thermometer Wireless App Easy Read, WiFi Digital Pool Thermometer Floating
7.9

Goveelife

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  • Smart Remote Monitoring: With a connected 433 gateway (up to 328ft /100m), you can easily monitor your water temperature data in real time from anywhere with the App. The Wi-Fi gateway can be paired with up to 10 sensors, extending your monitoring range to any location indoor and outdoor.
  • More Accurate: The pool thermometer sensor can detect temperatures ranging from -4F to 158F, can accurately detect the temperature change of 0.9F, refresh speed up to 2S, double-click the internal button to switch F/C.
  • IPX7 Waterproof Protection: The GoveeLife Pool Thermometer is waterproof and can accurately measure temperature even when entering the water. You don't have to worry about water damaging it at all.
  • Free Date Storage & Export: The GoveeLife pool temperature monitor supports online viewing of 20-day data graphs and export of data recorded over the past 2 years. Ideal for swimming pools, paddling pools, hot tubs, fish ponds, jacuzzis, spas, etc.
  • Long-Lasting: The pool thermometer is powered by 2 AAA batteries, divided into standard mode and powersaving mode. Battery life is 1 year in standard mode and 3 years in powersaving mode (APP setting). When the battery is low, an alert icon appears on the screen and the app will also send a low battery notification. The product can also be linked to GoveeLife's wallsocket products to automatically turn the pool heat on and off.
  • Easy to Use and Install: The GoveeLife Pool Thermometer also comes with a rope to prevent the pool thermometer from floating away while taking readings! Need attention: The included orange loop rubber is replaceable to make the pool thermometer stand out on the water!
  • Need attention: It is better not to have obstacles between the gateway and the sub-device, otherwise it may affect the stability of signal transmission.(2.4Ghz WiFi Only)

10. Raddy PT-5 Wi-Fi Pool Thermometer, Wireless Smart Floating Sensor with Indoor Console, APP Remote

  • Multifunctional Indoor Console: Displays real-time pool temperature with comfort icons, indoor temperature and humidity, min/max records, and a battery indicator for easy power monitoringall on a clear digital screen
  • Smart App Monitoring: Use the Tuya app to monitor temperature and humidity anytime, anywhere. Customize settings like time format and temperature units, review up to 1 year of data, and keep everything accurate with automatic time sync (Works with 2.4GHz Wi-Fi only)
  • IPX8 Waterproof Sensor: Engineered with dual sealing rings and integrated molding to deliver true waterproof performance. Built to withstand full submersion, making it perfect for long-term use in wet or challenging outdoor environments
  • Convenient Charging Options: The indoor console runs on a built-in 1200mAh rechargeable battery and charges via the included USB-C cable. The pool thermometer also features a 1200mAh rechargeable lithium battery, powered by solar energy or USB-C, ensuring reliable, low-maintenance operation
  • 300ft Wireless Transmission: Effortlessly monitor your pools temperature with a reliable long-range wireless sensor, transmitting up to 300ft in open areas. View real-time data on the indoor display from the comfort of your homeno need to step outside

Peter

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