Digital Salinity Tester for Salt Water - Waterproof IP67 Salinity Meter with ATC Large Range 0-200ppt Saltwater Tester for Seawater, Aquariums, Marine Monitoring, and Koi Fish Pond

This item is essential if you have a Koi pond. It is very easy to use and is very accurate.

Easy to work and accurate

Excellent Salt water tester Accurate Very Easy to Read Large print I use it on my Koi pond Extremely useful So Far so good had other ones they were good But I can see this one much better Definitely recommend

I changed from a Hayward T3 salt cell to a generic brand. The new salt cell works fine but it would not calibrate to the actual salt readings. I bought this to use and found it matched my pool stores reading exactly. Very easy to use. I dry it off before I put the cap on and put it away.

Do not trust the readings on this device. It severely underreported my initial salt levels, causing me to add way more salt than needed. Now my pool is heavily over-salted, and I’m stuck dealing with the massive hassle of draining and refilling water to fix it. To make matters worse, when I tried to return this defective piece of junk, I found out I have to pay for the return shipping to China—which costs exactly what the device itself is worth