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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
Sale Sold out
Tax included.

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 incompatible 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-it with app

You can free download our application on Apple Store (IOS) or Play Store (Android). Then you can follow advice from our recommendation engine to know when and how you can use our chemicals products.

How does it work?

Download the iopool app and configure your pool/spa. Then follow the step-by-step procedure. There you go! EcO feeds your water data back 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! 

Main advantages

  • Self-contained;
  • Discrete;
  • Easy to set up and use;
  • 2 years warranty;
  • More precise than manual testing.

Most common questions

What if I am not satisfied?

There is little chance that this will happen because trying an EcO is adopting it! However, if you were not completely satisfied, don't worry: we offer a "Satisfied or refunded" guarantee valid for 30 days after purchase.

Can I use the probe with another brand of products than iopool?

Yes. However, for the best experience, we recommend using the iopool brand as our recommendation engine is based on our products.

What is the life 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 functionalities 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 have to be near the pool (approx. 30 feet).

What are the water parameters monitored by the probe?

EcO monitors

  • The water temperature;
  • The disinfection capacity (Redox capacity, ORP);
  • The pH (hydrogen potential).

For elsewhere, thanks to the initialization process, our calculation algorithms have 3 important parameters:

  • The hardness of the water;
  • The alkalinity of the water;
  • The amount of stabilizer (cyanuric acid level).

Your question is not on the list?

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


  • After initialization, you can't get EcO out of water. See this article for more pieces of 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 34 reviews
Jordan Braun
EcO Water Monitor Does The Job

I've been using the EcO for three weeks now and it has been doing a great job of monitoring water quality. The unit was simple to install and the iopool app on my phone connected with the EcO immediately.
The app keeps historical data regarding the EcO's three main monitors, disinfection status, pH level, and water temperature, all of which I like to track. I was hoping that the EcO would have stats similar to what are seen on the test strip, which shows indicators for free chlorine, total chlorine, alkalinity, pH, total hardness, and stabilizer (CyA). This info is input into the eiopool app at install time. However, I'm not sure how much feedback the EcO will provide on each of these indicators. The EcO has already notified me when the pH level needed adjustment. I am eager to find out what other alerts the EcO will be able to diagnose.
The iopool app on my phone has already had problems. The phone indicated that the app kept stopping. I was glad to see that when I uninstalled and reinstalled the app that all of the historical data remained intact and the app started working again.
Overall, after three weeks I'm satisfied with my purchase. The EcO installed easily and is monitoring my pool. I am hoping that with this tool I will be able to keep the pool looking beautiful and the water safe.

Greg Larkin

You have not completed your order. I still do not have my Wi-Fi gate way.

Dustin Kredit
A little lacking

It would be nice if I could figure out how to get it to alert me if my ORP drops or if my PH goes out of range. Instead the only alert you get is if the temperature is perfect for swimming?

Hi Dustin,

Could you contact us at ?
There are some reasons why you don't receive the push notifications.
Thank you,
The iopool team

david jaramillo
Pool water monitor

Great value and it functions well. A few small quirks with the app, but nothing that would stop my from buying it or recommending it

Rocky Chadd

Seems to work