Industrial Test Systems 481348 Copper 3 in 1 Pool Check | Made in USA | 3 Parameter Pool Test Strips | Copper, pH, & Total Alkalinity | Easy Match Colors | Lowest Copper Detection Levels

Very accurate when compared to other tests I’ve used.

Great product works well

I liked using these Tester strips because they gave a much clearer reading than some of the other test strips I have purchased. They only gauge total alkalinity, PH, and copper, but since I could not get copper testing with many other strips, I'm happy to have these.. I tested them against a different kind of strip to gauge their accuracy and I found these to give a more accurate reading regarding the chemical content of my pool. I will say that the copper reading is a bit funny in that you have to fold the test strip in half and then look at the clearish the clearest transparent portion of the strip to match the color coding and read how much copper is in your pool. It's not a huge issue, but it isn't ideal. Still, for this price I'm satisfied with these copper test strips

Test strips work well to keep your chemical levels perfectly balanced. The strips are easy to read and makes keeping your water clear and clean

Works as they should

Total alkalinity and ph were inaccurate compared to two other brands of test strips. I bought this for the copper testing and I don't have anything to compare it to, but with the TA and PH so far off, there's no reason to believe that the copper reading would be accurate. I returned these test strips.

The colors on the test strips are hard to match to the levels on the bottle. Each level is very close to the next.

so easy to use and very accurate when testing for copper