TDS Meter Digital Water r,AMMZO Professional Water Meter,4 in 1, PPM Meter EC Meter,Temperature, for Drinking Water Home Aquarium and More.(White)

This is an excellent product. It’s very easy to use and the results were fast and easy to read. Very impressive. It’s exactly what I was looking for. Highly recommend to anyone in need testing their faucet water.

TLDR:Extremely easy to use/read, accurate (as long as you know what your water "should" be), and the additional Temperature and EC features are very helpful.Detailed Review:I got this to measure TDS for my fishtank. Typically, the TDS should be less than 300 ppm. Any higher, and you'll find that your fish or shrimp might get sick. After landscape changes in the tank, the TDS can skyrocket because particles and sediment will enter the water column. I first measured my tap water as a baseline (110 ppm) and then measured my established aquarium (180 ppm). My new fishtank with brand new rocks measured 410 ppm on the first day, but after a few days it read 215 ppm, so I know the TDS won't be an issue if I add fish now!Also, certain types of fish are very sensitive to temperature changes (and changes in water conditions in general), so having a precise temperature measurement device will come in handy. Now I don't really know what the EC should be for tap water or for a fishtank, but my tap water measured 220 us/cm and the fishtank was comparatively much higher, around 400 us/cm. So now I'm aware of a potential problem that could harm my fish, thanks to this device.

First time buying one of these meters and I was surprised how accurate it was I've used it on five different types of water. RO system, tap water, bottled water and old filter water. My RO water system Read 17 after I added a mineral filter it was at 28. Tap water was high 400 in the red and my old countertop single carbon filter wasn't as good as I thought it was and read it 400. Takes an LR44 battery which I have extras for alarm systems at windows and doors they're cheap alkaline to repurchase. I ended up buying a pH meter later which wasn't as accurate and things that will throw you off like the little packets of solution to make to calibrate them that is good maybe if you want to be really accurate but I happen to have some alkaline bottle water that I knew was 8.8 and went from that reading which was maybe 9.2 so I knew it wasn't only awful little bit. The manufacturer on those pH meters should let you know that their calibrated in the factory or should be instead of messing around with solution that you have to mix with distilled water. I like the TDS meter with the light also and goes red when your water is over 50 TDS reading I told my sister about it and she went ahead and purchased one too she uses well water and hers was at 170 but I told her that her water could be contaminated and should get it tested further and recommended those test strips but read those could be very inaccurate as to what I see with sellers on that product. Overall good purchase for the price of $10.99 and will allow me to test my RO water later so I know when it goes higher that I will be changing the filters once a year approximately on three of them. Wish I knew about these meters a long time ago.

I'm new to testing water parameters for my aquarium, but it was suggested that I start for the health of my fish. This water meter tool was specifically recommended. The price is very fair, it's easy to read, works instantly and -- from what I can tell -- accurately. I tested distilled water, filtered water, and tap water along with my aquarium water. The results were all on point. It easily switches from standard to metric, and measures water temperature also. I like that it will "hold" the readings so you can review them/write them down after removing it from the water. I'm definitely pleased with this purchase.

The display is not easy to read. The lcd segments are all dark when it is turned on. I have to find the right viewing angle to get a reading. Is it accurate? How could we know? I was a full time Metrologist for 15 years, so I will tell you - To verify accuracy, we need at least two liquid solutions. The ppm of one must be at the low end of the operating range for your instrument. The ppm of the other must be at the high end. If both solutions are displayed correctly, you might have an accurate instrument. You are only verifying 'span' in this step. To check the 'linearity' you would need to add additional, equally spaced test points through the middle of the test range. If you do not test ANY instrument against a known, and/or universal standard, you CANNOT know if it is TRULY accurate. Even then, you need to repeat the test periodically - start with 3 month intervals. Good luck.