Pool Salt Tester ORAPXI pH and Salt Meter for Saltwater Pool pH and Salinity Digital Tester 5 in 1 Salt Meter for Swimming Pools Hot Tubs and Swim Spas

I bought this device primarily to calibrate the chlorine generator on my salt water pool. It certainly was easy to set up and use. Just follow the directions at first, going ahead with the calibration process. Then rinse the tip with DISTILLED WATER after each us, allow it to dry, an replace the protective cap. Don't touch the contacts or glass bulb on the tip of the device and don't drop it. If you are careful with it, I imagine this will last a very long time. It seems quite accurate, including taking salinity, pH, and temperature readings. I'm not sure how safe it would be for something that is critical like a salt water fish tank, but for a salt water swimming pool, this device is super, at least so far!

The device was delivered timely and seems to work well. Time will tell if it was worth buying.

It is easy to use out of the box. It is very consistent with the salt level readings (I double-checked with a chemical tester and the difference was less than 100ppm, which is fine to check salt levels for a pool with a salt chlorinator). So worth to do salt level measuring - takes a few seconds and reliable. As for pH, you have to calibrate it frequently (it comes with the powder to do the calibrations), but becomes a hassle to calibrate and you never know if it is calibrate it or not. So I use the chemicals to measure pH (just more reliable and consistent over time).

Bought this for our saltwater pool. Worked great right out of the box. Haven't calibrated the pH sensor yet, but it lines up with readings from our chemical test kit. It will pay for itself in the cost of salt test strips alone.

In December, I received nice salt aquarium for Christmas will all the bells and whistles. However, while bringing it up, i didn't like using the traditional refractometer as it can be hard to see. So I bought this. Everything worked fine for 45 days. Then I performed a water change with water I had made to match the tank. I did the change. Later that night, I use the meter to spot check the tank as that is what you do when you micro manage your marine tank. It read 28ppt. I panicked and began raising the salinity over the next day to 35ppt. All is fine. I thought! Then 95% of my large inverts die. All snails but one, all shrimp but one, all crabs but one, and all copepods. I cannot figure it out, checking everything. Next, my coral. All but 4 frags die. 2 of those very ill. I run an ICP test my water comes back perfect with the exception I'm at 44ppt. I assume something could be wrong on their end and took my tester to my son's house and put them side by side. His read 35ppt in his tank, and mine reads 27.5. Never trust this when you have animals lives at stake. If something seems off get the refractometer out. This device and my trust cost me about $500 bucks in livestock.

This device is great for checking the salt level in our pool!

A must have for saltwater pool. Saves me the time from having to take samples to the local pool house supply for testing.

It's convenient and a great idea. However, even after calibration its readings differ from other instruments. pH is accurate, certainly enough for my purpose of pool testing. Salt (conductivity) readings are inaccurate. Still working on this, but after a few days I'm not convinced the salt (conductivity) readings are correct. You might be able to narrow the uncertainty by getting test results from other sources and adjusting your own readings, but I had hoped for better accuracy.