DANOPLUS Smart Water Quality Tester, 24 hrs Wireless App Monitoring of pH EC TDS Salinity SG Temperature, Mountable with Alarm Function for Aquariums & Hydroponics

I honestly feel like we are beta testing this system prior to launch. Setup was slightly confusing without having any wifi connection indication light and none of the sensors hold calibration. I've calibrated mine numerous times and it's always about 4 points off and takes about 15 minutes to stabilize on a number. The app also seems to be poorly written having to input thresholds numerous times before they take.

Calibration of each sensor is necessary, but there are few errors and everything works normally. There is also a remote monitoring function, so it is safe to monitor at all times. Great product.

I had a different model of a similar device from a different company. It worked briefly and then the meters all went wacky. I could not make it continue to work. I read a review somewhere where somebody said that the TDS meter electronics interfere with the pH meter. I am not interested in monitoring my TDS nearly as much as I am the pH. I am using this meter with only the pH meter in the solution.The bad news is that this device came uncalibrated and required calibration before I could use it. It was off by more than one whole point pH. Since I have calibrated it, it is holding its measurement, and reading accurately. I have not had a long enough to discover if it will fail like the last unit and every other cheap pH monitor I have bought. At this moment, it is working fine, and I cannot say anything bad about it except that I did not like having to calibrate it. For that reason, I’m giving it four stars. If it continues to work for pH, it will result in a good value for my dollar. If it fails after a few weeks, like every other cheap pH monitor I have bought, I will update my review. Until then, it gets four stars.The S/W app kinda sucks. The graphing is awful. I worked at a company that made software to do industrial gauging and display measurements and I would’ve fired the guy who wrote our software if he delivered this to me. I’m tempted to knock it down to three stars for the software, but the software does give the current reading accurately, and that is enough to make it four star valuable for me. It is my experience that if you want a high-quality PH and TDS meter you’re going to have to spend a lot more than this. After this works for a month, I will drop the TDS meter in and see if it fails. I will update the review at that point.

Bought 2 units, both did not pair with 2.4ghz wifi. 2/2 duds. Tested unit vs pen. Unit was .3 off for ph. Even with calibrating 250ml distilled water and their ph powder. Not a good unit.

I've had this for my reef tank for a week or so to monitor ph. The wifi option was a great selling point so I can see in the morning how it was overnight. I know these kinds of sensors need to be recalibrated with some frequency and have lots of the calibration packets as I also have a stick ph tester and recalibrate that almost every time I use it.Sure enough within a week it was claiming my tank ph was around 6.4 and my other tester and ph testing strips both showed it was closer to 7.6. Oddly it did not show the same swing when placed in distilled water, but did show freshly made salt water from that same RODI water was just as off.So ok, just needed a good wiping off and recalibration. Except, while it will properly calibrate the 4.01 and 6.86 packets, when I try to get it to calibrate the 9.18 it will first read it at 9.18 but then tries to calibrate at 7.0. So I just didn't do the final calibration, but that means the reading will not be very accurate.I get it needs to be recalibrated, and even would rate this as 4 or 5 stars if it needed to be recalibrated once or twice a week, but if it won't fully recalibrate after just a week its not worth it for those of us with reef tanks. Especially given its issues with reading saltwater. (Also its salinity tester is .04 off which is also a problem). I gave a two instead of a one since it might have some use for some freshwater testing. But, I do not recommend this product at this time.

I have the app but no matter what I do I can't get the item to connect to wifi. Doesn't seem to be listed under manual device select either.Edit: came back to let Amazon people know I've got it connected to wifi. What I did was had to do manually add device. I chose the option "sensor other" then followed the prompts. Working well now. Just wanted something I could glance at to know ph temp and salinity of reef tank. Nice little affordable way to have these numbers handy. Hopefully it holds calibration and lasts a while. I am using a pinpoint ph electrode fyi

The media could not be loaded. Probe was submerged in aquarium water for its entire life. PH probe lasted from Jan 27th to March 14th. I tried recalibration several times and doesn’t help. Never got an alert when the probe claimed my pH spiked from 7.6 to 13.2. DO NOT PURCHASE.. You get what you pay for.

I was wanting a pH, salinity monitor for my saltwater aquarium, there are two other similar monitors here on Amazon and I bought them both before getting this one. Don't waste your time or money on the other two. One had trouble calibrating salinity and the other calibrated and then when I checked it the next day it was out of calibration and I could not calibrate it again. This monitor is the one you've been looking for. Easy to calibrate, easy to read, and plenty of options for what you want to monitor. Top-notch product if you ask me. Highly recommend!