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

Regular price $249.00 USD
Regular price Sale price $249.00 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 49 reviews
Love it with one exception

We love the convenience that the ioPool/EcO offers with one exception: Due to us using it in a commercial pool, our US State issued final order granting petition for a permanent variance for the testing application/system doesn't yet exist. Therefore, we are forced to continue using old fashioned manual paper and pen to record chemical levels, putting us at risk of abnormal violations.

Christopher Baines

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

Shawn Barker
Great for Hot-tubs and pools

his was easy to setup and works like a charm. Next they should add chemical subscriptions

Just so-so

Honestly I’ve been a little underwhelmed with the sensor. It gives pH and chlorination levels, but not total alkalinity or hardness levels like I had hoped. Also it disconnects frequently from my phone and other times when it is connected, I still have to force close my app just to get the report to refresh. I thought I could rely less on test strips with this system and that just hasn’t been the case so far.

Jason Schott
Taking the work out of water care

The Ipool is a great help in easily monitoring PH level only thing I wish is it would let you know water harness also would be great for reminders on filter cleaning and weekly chemical adjustments! Overall though very impressed with this unit