WaterGuru Sense S2 Smart Pool Monitor – Digital Pool & Spa Water Tester for Chlorine, pH, CYA & Alkalinity – Wi-Fi Enabled – Includes C5 Cassette, Float Ring & Batteries

For the money this is a very good water testing system. I use it to monitor a remote pool and it works well for that purpose. It sits in the skimmer & tests the water daily. You can set the time of day, but no option to skip test days. I think I used two cartridges a season in NorthEast. It tests free chlorine, pH, water temperature & water flow at the skimmer. It has helped immensely, but disappointed it stopped responding after two seasons. Worth the money & relatively inexpensive compared to the few competitors. Cartridge 5-pack is $50. It is accurate & does require wifi to work. They provide water testing for detailed analysis, but my two tests did not get uploaded this season. You can manually upload detailed pool test data if you have a local tester. This house is remote so testing water locally is challenging. The app interface is easy to use & they calculate estimates for what product to add based on pool size. You can have multiple units & share the access to family members. Worth the money, no green pool for two years. Buy long lasting Lithium C batteries, the extended use is well worth the extra cost.

DO NOT purchase!!!! First which really isn’t advertised, you spend $350 for basically a drain cover and holder for the testing/sending cartridges which must be replaced every 30 days. When the cartridge reaches 30 days it stops testing the water and updating the app. Here is the kicker you can only buy the cartridges directly from Waterguru for around $80, but they are supposedly having supplier issues getting the replacement cartridges and you cannot get them. So after 30 days and spending $350 the Smart Pool Monitor is useless and dead in the water…. This company is scamming people selling products that will stop working in 30 days.

I purchased and installed the WaterGuru Sense Series 2 a few days ago. The installation was very straightforward. Install the batteries, plug the cartridge into the sensor, then drop the sensor into the skimmer and you're done. And don't forget to install the app on your phone and connect to the sensor via Bluetooth and WiFi. After a short period of time, I got feedback on my phone about the current conditions of the pool: pH level, free chlorine (FC), total alkalinity (TA), cyanuric acid (CYA) level, and calcium hardness (CH). If you use salt to soften the pool (or I suppose if you have a saltwater pool) there's data for that as well. My pool had been serviced the day before so I expected the readings to be high. No surprise that the pH level was high, the TA was high, and the CH level was high. Over the next couple of days, I watched the levels drop closer to the normal range--and I intend to share the results with my pool maintenance company so they can manage my pool more effectively. My 'pool guy' is already excited to see the results to help him save time, money, and chemicals during his regular maintenance schedule. If I want to do it myself, I now have enough detailed information about what chemicals (acid, chlorine, etc.) need to be added and in what quantities to make it a manageable task. The Water Guru Sense S2 is a game-changer for pool maintenance. It eliminates the guesswork, can save you money, and at the very least, provides actionable insight into the state of your pool. If you're using the pool on a regular basis, or have kids, family members, and guests enjoying the pool (after all, summer is pool party season), this is a must-have to ensure that everyone can enjoy the water safely and without risk. Highly recommended.

I had been one of the earliest pHin users, until Hayward acquired it and then eventually shut it down. I can understand why, since I had received in total 5 warranty replacement units. Then, I decided to go without a monitoring device for one season, which worked fine, until it didn't this year, when I went on a two week international trip and then I returned to a full algae bloom. My gamble that I would be back in time did not pay off, so I got the WaterGuru2 to stop flying blind and Wow! it's so great to have this level of fine grained data. I had been toying with Pentair pH & CL test kits and then the Taylor test kit too, but now I always exactly where my measurements are at. Now I've got a much better handle on all the major variables in my pool, which actually took a while to fully understand since I didn't know any of this before. As you can see from my screen shots, my pH is currently a bit low, but I'm told that's reasonable since I use the Tri-Chlor slow dissolving tablets, but my CYA (CYanuric Acid) is through the roof too high. We figured out today that this is because I had been using 99% DiChlor to shock my pool, which spas like to use, but it's not appropriate for my pool, so I need to switch to 68% Calcium Hypo. I'm also going to see if a new CYA remover does what it says it can do, to get my CYA down to normal levels. I'm also going to add in Green to Clean since my high CYA is preventing the full killing of some nagging algae that still remains and likes to come back. The WaterGuru support team, both Tier 1 and Tier 2 have been a true pleasure to work with. With your purchase of the WaterGuru2, you get two types of Sense2 cartridges, 1 C5, which monitors pH, FC plus CYA, Hardness and total Alkalinity and lasts 30 days, and 2 C2's, which measures just pH and FC daily and these each last for 60 days. Once you get into a steady state C2's are enough. By the way, if you're recovering from something as bad as an algae bloom, please refrain from excessively invoking "Measure" on the WaterGuru2 app, since this will shorten the life of the cassette dramatically, since the measuring film scrolls through the cartridge and it will run out faster. By default the WaterGuru2 measures the water once a day and that's actually good enough for residential owners. Anyone who loves data and is tired of "winging it", or "excessively shocking your pool", or "just paying too much monthly to your pool person" should get a WaterGuru 2.

Pros: Testing seems to be pretty accurate. App is free and makes it convenient to monitor the pool conditions. The app gives suggestions and tips on improving various levels. Cons: Testing is done through cartridges. If you only test the water once per day, each cartridge will last about a month. A 5-pack of cartridges is $150... which is a little spendy. My biggest complaint is the battery life. The unit takes 4 C-cell batteries that only last about 2 weeks (based on Arizona heat in July-Aug). I would think a solar powered unit would be a better eco-friendly option.