EASYTEST 9-Way Pool Test Strips, 140 Strips for Hot tub and Spa, Accurate Testing pH, Total Chlorine, Free Chlorine, Bromine, Alkalinity, Total Hardness, Cyanuric Acid, Salt and Copper

I have found that the Hardness, Free and Total Chlorine, Alkalinity, and pH are pretty close but the Cyanuric Acid is basically useless as it is for most paper test strips from my understanding. CA showed zero when it was actually about 80ppm when I first tested. I have the TaylorK-2006C which is perfect for fine tuning your chemicals and shows far more precise numbers but it's also $125 so I only use it to get my CA and alkalinity. I also bought a separate electronic salt meter that shows pH, etc and the strips are close but when adding pH down, I refer to the pH reading on the electronic meter so I don't add too much. But for what they are these test strips are the cheapest and best way to keep track of your pool's readings.

Easy to use and easy to read. Some of the sticks are missing the square to test some of the chemicals. Some of the sticks were cut very narrow. Overall happy with purchase as it tests for a lot more than chlorine.

Not sure on accuracy because im using bromine but chlorine is registering on the tab.. idk, the colors on the tabs change and if you add more chemicals the colors change in the right direction for the chemical you added. Im not a chemist, I only play a chemist in a pornographic soap opera but I did stay at a Holiday InnExpress last night

I purchased these for my hot tub and use them often. Not disappointed and it very easy to test the levels. I will definitely buy from this seller again.

Read the product photos very carefully. There are indeed 140 test strips. However only 10 salt and 5 copper test strips are included. This important detail is not included in the description and is mentioned in only one photo. Beware! Thought I was getting a good deal for copper testing until I opened the test kit. Signed: Pool owner for nearly three decades and disappointed.