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

Regular price $279.00 USD
Regular price Sale price $279.00 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 Premium 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 (99 USD) 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 Premium 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 14 reviews
Amanda Owens
It doesn’t work,

I received the bundle with the pool monitor. It doesn’t work, I can’t reach customer service for assistance and can’t find the information to return it. It’s a scam and web site and customer service is not helpful. Don’t buy it!

Hi Amanda,

We are very sorry for this situation. I sent you an email and activated your EcO Start pack. Now it should be working. Could you please try again ?

Thank you !
Alex from iopool

Lee Redmon
Love the product - Service needs improvement

The Eco Start is a great buy! I haven't been able to find someone in my area to maintain my pool. This device and the products provided are helping me keep my pool at a healthy level. The product is soooo good I am willing to work through the EXTREMELY challenging customer service received in the US. I have not received updates on orders. I have had to reach out multiple times only to find out my order will be shipped in the near future. Given the Amazon world of immediate support and shipping this is a serious flaw. Again I love the product and will continue to use it for the health of the pool. I just wish the service matched the amazing product.

Karen Burch
Who Needs a Pool Guy When You Have One of These

After upgrading from an above ground to an I ground pool I was concerned about the maintenance. Decided to try this. Pool is so clear. I love that I can check the water temp and chemical levels at any time. Temp is running exact with my solar thermostat. Loving this so far.

Good tool, but lacking some features

I bought the iopool after trying to use strips, Sutro in pool electronic device, and other chemistry tests. In terms of measuring pH, iopool is easily the best and most convenient. I also really like the frequency of the sampling and the long battery life. It would be nice to see chlorine in ppm instead of mV (isn't a common measurement in the US). Also, total alkalinity would be great to add. The fact that you will likely need the gateway device in addition to the iopool device to get consistent and accurate readings is also a little disappointing.

Frank Levinson
Working Very Well

I have a hot Tub and an endless pool, so I bought 2 of the IoPool devices. They both work terrifically and helped me to see that I was keeping my pool and spa too acidic. They also give me real feedback about how to keep both systems better check which will ultimately use less chemicals.

The app worked well and it is easy to flip across screens to see both systems quickly.

I highly recommend.