Advertising Disclosure

Best pool water monitoring systems - Holiday Sale 2025

Last Updated - December 14, 2025

1
Best Choice

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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)

Crystal Water Monitor

$449.00

More Details
Main highlights
- 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.
- TAKES GUESSWORK OUT OF ADDING CHEMICALS: Scan your chemical’s 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.
- 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.
- 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.
- 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.
$449.00
2

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

WaterGuru

WaterGuru Sense S2 Smart Pool Monitor – Digital Pool & Spa Water Tester for Chlorine, pH, CYA & Alkalinity – Wi-Fi Enabled – Includes C5 Cassette, Float Ring & Batteries

WaterGuru

$399.00

More Details
Main highlights
- Wi-Fi Setup Guidance – Connects to your home Wi-Fi for automatic daily readings. For best performance, ensure the device is within 30 ft of your router or mesh node. If you experience connection issues, go to Your Orders, select your WaterGuru SENSE S2, and choose Get Product Support for assistance.
- Reliable Pool & Spa Testing – Measures five key water parameters daily: pH, free chlorine, cyanuric acid (CYA), total alkalinity, and hardness. Helps maintain balanced, clear water for safe swimming.
- Manufacturer Support Program – Every customer has direct access to our US-based support team for help with setup, connectivity, or readings. For support, go to to Your Orders, select your WaterGuru SENSE S2, and choose Get Product Support for assistance.
- Fits Most Skimmers – Adapters Available if Needed! WaterGuru SENSE S2 fits round skimmers between 8.25” and 9.4” without an adapter. For 10” square skimmers, use the WaterGuru Square Adapter. For round skimmers larger than 9.4”, use the WaterGuru Circle Adapter. Both adapters are sold separately.
- Exclusive Compatibility – The WaterGuru SENSE S2 works exclusively with two cassette options: the C5 Cassette (included with purchase) and the C2 Cassette. The C5 Cassette lasts 1 month with daily measurements, while the C2 Cassette lasts 2 months with daily measurements.
- Easy Installation – Drop the device into your skimmer for fast setup. No test strips required. Step-by-step guides, FAQs, and troubleshooting are available in the WaterGuru App.
$399.00
3
11% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

kactoily
11% Off

Smart Pool Chemical Monitor, 24/7 Digital Pool Water Tester and Pool Chemical Monitor for pH, Chlorine, Salt, ORP, TDS, EC, Ideal for Inground and Above Ground Pools

kactoily

$159.99

$179.99
(11% Off)

More Details
Main highlights
- Solar & USB Dual Charging : Efficient solar panel eliminates the need for frequent battery replacements. USB charging option ensures continuous operation in all conditions
- IPX8 Waterproof & Durable : Designed to withstand full submersion in water with an IPX8 rating. High-quality materials ensure long-lasting performance even in harsh pool environments.
- High Accuracy & Reliability : Advanced lab-grade sensors and automatic temperature compensation deliver precise readings, ensuring you have accurate data to maintain optimal pool conditions.
- 7-in-1 Comprehensive Water Testing ：Simultaneously measures pH, Chlorine, TDS, ORP, EC, Salt, and Temperature, providing a complete picture of your pool water quality without needing multiple testing devices.
- 24/7 Smart Monitoring : Connect to the Tuya APP for real-time data monitoring, historical trend analysis, and instant alerts when water parameters fall outside recommended ranges.
$159.99
$179.99 (11% Off)
4
Best Value
20% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Yewhick
20% Off

Yewhick Smart Pool Monitor with Gateway, Profession Salt Water Pool Testing kit for Swimming Pool, 7 in 1 Chlorine Salinity ORP Monitor for Aquarium Sodium Chloride Swimming Pools Hot Tub Spas

Yewhick

$139.88

$175.88
(20% Off)

More Details
Main highlights
- 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.
- 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.
- 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.
- 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
- 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.
- 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.
$139.88
$175.88 (20% Off)
5

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Terronix

Digital Pool Water Tester, 7-in-1 Smart Floating Meter, WiFi Enabled, Tests pH, Chlorine, Salinity, ORP, EC, TDS, Temperature

Terronix

$179.68

More Details
Main highlights
- 🔹 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.
- 🔹 Simple Setup & Continuous Monitoring: Enjoy hassle-free setup—just 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.
- 🔹 Real-Time Data Sync with Mobile App: Connect to the Tuya mobile app via WiFi to monitor your pool’s 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.
- 🔹 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.
- 🔹 7-in-1 Multi-Parameter Water Testing: Accurately measures pH, TDS, EC, free chlorine (CL), ORP, salinity (SALT), and water temperature—all with a single smart device. Perfect for maintaining balanced water in residential pools, spas, hot tubs, and saltwater systems.
$179.68

Best pool water monitoring systems - Holiday Sale 2025

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)

WaterGuru Sense S2 Smart Pool Monitor – Digital Pool & Spa Water Tester for Chlorine, pH, CYA & Alkalinity – Wi-Fi Enabled – Includes C5 Cassette, Float Ring & Batteries

Smart Pool Chemical Monitor, 24/7 Digital Pool Water Tester and Pool Chemical Monitor for pH, Chlorine, Salt, ORP, TDS, EC, Ideal for Inground and Above Ground Pools

Yewhick Smart Pool Monitor with Gateway, Profession Salt Water Pool Testing kit for Swimming Pool, 7 in 1 Chlorine Salinity ORP Monitor for Aquarium Sodium Chloride Swimming Pools Hot Tub Spas

Digital Pool Water Tester, 7-in-1 Smart Floating Meter, WiFi Enabled, Tests pH, Chlorine, Salinity, ORP, EC, TDS, Temperature

You may also like...

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

New Digital Pool Water Tester & Smart Pool Monitor for Chlorine, ORP, Salinity, pH, EC, TDS & Temp - 24/7 Pool Chemical Monitor for Hot Tubs, Pond & Spas

kactoily Upgrade Smart Pool Monitor, Digital Pool Water Tester for Measures pH, ORP, Chlorine, TDS, Salinity, and More, Real-Time Monitoring, Ideal for Pools, Hot Tubs, and Aquarium

BCONE® Pool Alarm by Lifebuoy® | ASTM F2208 Certified | Floating Safety Device with App Alerts + Alexa Voice Control | 2.4GHz Wi-Fi | for Inground & Above-Ground Pools

Pawfly 6 in 1 Digital Water Testing Kit, Digital Hot Tub Water Tester, Digital Pool Water Tester for pH, Total Chlorine, Free Chlorine, Total Alkalinity, Cyanuric Acid & Bromine, Digital Pool Test Kit

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

DROPLYTIX Mobile App Water Test Kit–20-in-1 Home Water Testing Strips, Pools, Hot Tubs, Aquarium, Drinking Water & Well Water Test for pH, Hardness, Lead, Iron, Chlorine, Nitrate, Fluoride, Mercury

7-in-1 Digital Pool Water Tester – Chlorine, pH, Salt, ORP, EC, TDS & Temp Meter for Saltwater Pools, Hot Tubs, Spas, Aquariums & Hydroponics | Accurate Digital Chlorine Level Tester for Pool Safety

GoveeLife Smart Pool Thermometer with WiFi Gateway, Digital Swimming Water Thermometer Temperature Monitor with IPX7 Waterproof, Remote App Notification Alert for Ice Bath Tub, Fishbowl, Pond, Hot Tub

GoveeLife Smart Pool Bath Thermometer Wireless App Easy Read, WiFi Digital Pool Thermometer Floating with IPX7 Waterproof, Notification Alert, Water Temperature Monitor for Swimming Pond, Hot Tub

Sign up and get exclusive special deals