How does WaterGuru Work?

WaterGuru is a smart device that’s installed on your skimmer with its Sensor dangling in the skimmer basket. WaterGuru uses patented optical technology to measure the Free Chlorine (FC) and acidity (pH) of your pool water. You can monitor your pool conditions through the SENSE app.

WaterGuru SENSE Setup Instructions

What does WaterGuru measure?

WaterGuru measures the free chlorine (FC), acidity (pH), temperature, and flow of your pool water.

Why does Measure Now take up to 15 minutes?

  • SENSE is made to be accurate and self calibrating.
  • During each reading the SENSE is calibrated to account for the unique environment of your skimmer at the time of measurement.
  • The water exposure of the proprietary chemistry pads is more than 10 minutes to stabilize the color change in each pad.
  • This ensures most accurate and consistent measurements.

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What causes Measure Now times to extend to 90 minutes?

  • When a Measure Now is requested from outside the Bluetooth range of the device, the request is sent through the cloud.
  • SENSE is designed to conserve power by being idle for 99% of the time in routine operation.
  • It checks in with the cloud for the new requests every hour.
  • So there can be up to a 60 minute delay from when the measurement is requested.
  • After measurement, the data are sent to the cloud to sync with the App.
  • So it can be within 15 minutes, if the cloud check happens right after the measurement request and up to 90 minutes to account for the cloud check delay and errors during measurement.

How do I ensure Wi-Fi connectivity for my SENSE?

  • Always setup SENSE while placed on the skimmer, its intended location of use.
  • To evaluate the connectivity between your Wi-Fi network and the SENSE:
    1. Stand close to the SENSE within its Bluetooth range.
    2. Goto the Settings menu from the Dashboard.
    3. In the WaterGuru device item, click on the network name to see the Wi-Fi strength.
  • SENSE will work the best if you have at least 2 bars of Wi-Fi strength.
  • If the SENSE can not detect Wi-Fi then you will need to setup a Wi-Fi range extender.
    1. Wi-Fi extender should be located higher to create a line of sight.

How can I get a WaterGuru?

You can purchase WaterGuru right here on our website.

Does WaterGuru work in Salt water pools?

WaterGuru works just fine in salt water pools with salt levels up to 5000 ppm.

How long do the batteries last?

WaterGuru C size batteries last for approximately 6 months. Performance may vary based on the brand of batteries used. WaterGuru recommends using ‘Energizer’ brand batteries which we have tested extensively.

How do I change the batteries?

  1. The Battery compartment is located under the WaterGuru Skimmer cover.
  2. Remove SENSE from your skimmer and place it with the WaterGuru logo on the ground.
  3. Wipe away all the moisture with a cloth. It’s important to keep moisture out of the battery compartment to avoid corrosion.
  4. Open the battery compartment and remove the old batteries. Safely dispose of the batteries.
  5. Insert 4 new C size batteries from recommended brand and firmly close the battery compartment. (Manufacturers have varying characteristics in their batteries. Our testing has shown batteries from ‘Energizer’ brand perform the best in the environment that WaterGuru is exposed to.)
  6. Flashing LED lights will indicate that unit has turned on.
  7. Place the Sensor unit back in the skimmer with the cover on top of the skimmer.

WaterGuru Battery Replacement

How to change Wi-Fi?

Wi-Fi settings for your unit can be changed in the WaterGuru App. WaterGuru App uses Bluetooth (similar to connecting to your car) to communicate with your unit. You will need to be close to the unit when trying to change the Wi-Fi settings for your unit. You can find the instructions here.

What is the WaterGuru Cassette and where can I get a replacement Cassette?

WaterGuru Cassettes hold strips of sensing pads that measure chemistry. You can purchase a cassette right here on our website.

How do I replace the Cassette?

  1. Remove the Sensor unit from the skimmer.
  2. Open the mesh bag and remove the cassette.
  3. Wipe the optical window clean in the Sensor unit at the bottom of the cassette well.
  4. Insert a new cassette in the Sensor unit all the way until it clicks.
  5. Tie the mesh sock around the cable such that no debris enters the Sensor unit and the cassette. Small debris such as insects, sand, soil, etc. can get in the optical path and result in incorrect readings.
  6. Place the Sensor unit back in the skimmer with the cover on top of the skimmer.
  7. Open the app and tap the pool icon at the bottom of the screen. In the “Supply Levels” row tap the right arrow and then mark that the cassette has been replaced.

WaterGuru Cassette Change

How often do I have to change the Cassette?

WaterGuru refillable Cassettes have enough pads for taking 60 reads. With typical usage Cassettes last approximately 2 months.

Do you charge extra for pool maintenance advice?

No, it’s absolutely free and included in the app as a WaterGuru SENSE owner.

Is there a subscription fee?

We don’t believe in subscription fees.


How does it work?

  • We will send you prepaid envelope with a vial
  • You fill the vial with the pool water and send it back to us
  • We perform a professional lab analysis on your pool water for 10 important parameters
  • The water TEST results are available to you in the App with customized advice for your pool treatment

WaterGuru TEST Instructions


  • WaterGuru TEST is lab grade analysis of the pool water that is used to customize the treatment advice in your pool
  • Our advice based on these results will result in minimum use of chemicals and keep your pool trouble free

How do I order TEST?

  • WaterGuru TEST is included with every WaterGuru SENSE order. You can purchase SENSE here.

What chemicals are tested?

WaterGuru TEST analyzes your pool water for the following parameters:

  • Total Alkalinity (TA)
  • Cyanuric Acid (CYA)
  • Calcium Hardness (CH)
  • Phosphates (Phos)
  • Salt
  • Copper (Cu)
  • Iron (Fe)


What is available in the store?

Visit the Supplies page to order supplies that are delivered to your door.

Can I substitute with other brands?

  • We have conducted testing with recommended chemicals in the WaterGuru store and WaterGuru treatment plans are based on provided chemicals.
  • You can substitute chemicals with other brands, but your treatment plan specifics may vary.

What quantities of chemicals do I need?

You can get customized advice for your pool treatment in the WaterGuru App available for iOS and Android phones.


When will your order ship?

In most cases, your order will ship from our warehouse within 1-2 business days. We’ll send you an order confirmation email, then another email when it ships that has your delivery service information and tracking number.

If part of your order isn’t available for immediate shipment, your order will not ship until all items are available. Some chemicals are incompatible with each other and we will separate those orders automatically.

Shipping methods and carriers that we use?

  • WaterGuru chemical orders will ship UPS ground
  • You can choose a shipping method during checkout
  • Currently, we ship in the USA only

How to check the status of your order?

We’ll send you an order confirmation email, then an email upon shipment that has your delivery tracking number.

Search your inbox for an email from orders@waterguru.com with the subject “Your WaterGuru order.” You may also have to search your junk mail or spam folder.

How to cancel or make changes to an order?

Once you place an order, you have a short time to cancel or make changes to the order. Please call the Support Center to cancel your order. This is because we send all new orders to our warehouse to be packed for shipping as soon as possible.

How to return a WaterGuru product?

  • Chemicals are hazardous materials and can not be shipped easily. We recommend that you dispose of any chemicals in accordance with the local regulations.
  • You can contact WaterGuru Support for refunds on any orders that do not involve chemicals.

Want to talk with someone?

Give us a call at 1-855-701-3889

Send an email to support@waterguru.com

Submit a question

Want to talk with someone?

Give us a call at 1-855-701-3889

Send an email to support@waterguru.com.

Submit a question