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EcO Start - Smart Water Monitor - Works in Pools, Hot Tubs, & Swim Spas

Regular price $299.00 USD
Regular price Sale price $299.00 USD
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Why use the EcO probe?

EcO is a pool/spa probe connected with our mobile application. Our probe helps pool and spa owners to keep clean and safe water, simplifying maintenance. The probe provides treatment advice and a step-by-step explanation about pool/spa care.

EcO is compatible with:

  • swimming pools treated with chlorine or active oxygen;
  • spas treated with chlorine, active oxygen, or bromine;

EcO is not intended for use with:

  • swimming pools and spas treated with salt.

Included in this pack :

  • One EcO probe;
  • Bluetooth / Wi-Fi Gateway (incl. in EcO Start and Connect only); 
  • Start guide;
  • Unlimited access to the mobile app without any subscription.

Use with our app

You can free download our app on Apple Store (iOS) or Play Store (Android). Our recommendation engine walks you through the “how” and “when” of chemical treatments.

How does it work?

Download the iopool app and configure your pool/spa. Then follow the step-by-step procedure. That’s it! EcO sends water health data to your smartphone when you are near your pool and provides you with treatment recommendations to keep the water clear and safe for your family! 

Primary benefits

  • Self-contained;
  • Discrete;
  • Easy to set up and use;
  • 2 year warranty;
  • Improved precision over manual testing.

Common questions

What if I am not satisfied?

We think that once you try an EcO, you’ll love it! However, if you’re not completely satisfied, don't worry: we offer a 30-day money-back guarantee.

Can I use the monitor with non-iopool branded products?

Yes. However, for the best experience, we recommend using the iopool brand because our recommendation engine is designed around our own products.

What is the lifespan of the probe?

EcO has a lifespan of 2 years, after which you will have to order a replacement module including a new battery and sensors. Buying this module extends the warranty for two more years.

What is the warranty period for the probe?

The EcO probe is guaranteed for 2 years from the date of purchase.

Do I need to pay for any subscription?

No. You can access all functionality without any subscription, including customer assistance by chat.

Can I access my data around the world?

This is possible with the iopool Bluetooth / Wi-Fi Gateway included in the EcO Start and Connect pack only. By default, EcO uses Bluetooth Low Energy (BLE) technology to send data to your smartphone, so you must be near the pool (approx. 30 feet).

What are the water parameters monitored by the probe?

EcO monitors

  • Water temperature;
  • Disinfection capacity (Redox capacity, ORP);
  • pH (hydrogen potential).

Our algorithm derives 3 additional parameters from the initialization process:

  • Hardness of the water;
  • Alkalinity of the water;
  • Amount of stabilizer (cyanuric acid level).

Have additionnal question?

Refer to the dedicated section of our FAQ or contact us via in-app support or on the website.


  • After initialization, don’t remove the EcO from the water. See this article for more information;
  • If you have a bromine pool, never follow the "add chlorine" recommendation of the app. For more information, see this article.
  • EAN code :  5419980032898

Customer Reviews

Based on 43 reviews
Greg Petsch
Iopool is great

I have not needed a water test since the iopool was activated. My water is perfect

Whit Runion
Cool concept but doesn’t really work

I’ve had the iopool for a couple weeks and it does not seem to be giving accurate readings. I took a water sample to my local supply company and the test results they gave me were almost exactly opposite of what the iopool is giving me. I’m very frustrated and do not know if this thing is working at all. The chlorine level seems correct but the Ph reading is completely opposite of the water test. I verified the pool water with test strips and am finding the iopool is completely wrong. Maybe I just got a dud. I do not recommend this product.

Hi Whit,

Could you contact our team at so we can check what's wrong with your readings/monitor?

Thank you,
The iopool team

Jonathan Gottlieb
Helps with monitorung

This is a good tool for monitoring ph, sanitation and temp. Does not substitute for the occasional visit to the pool store to get your water tested. Test strip page needs to be updated with proper measurement numbers. If 7.4 is the measure of human tears, why is that number not part of the scale. I'd like to buy the strips but way too expensive and shipping was calculated at $16. Really?

Michael Anderson

I've been looking for something exactly like this since my previous system was discontinued. Having used the other since it was beta tested, I had grown quite accustom to the "automated" monitoring. I tried a few other ways to maintain my hot tub, but nothing was quite right. I somehow stumbled upon iopool and have to say it is better than anticipated. It is, by far, the best monitor system I have used and it makes maintenance a breeze!

Diana Parsons

EcO Start - Smart Water Monitor - Works in Pools, Hot Tubs, & Swim Spas