Review on 🐠 JNW Direct 9 in 1 Aquarium Test Strips for Fish Tank - 100 Strip Pack | Accurate Freshwater and Saltwater Water Testing | Test Hardness, Carbonate, Nitrate, Nitrite, pH & More by Monica Reese

So I think (as with all test strips) that individual tests are reasonably accurate. The most important thing about this monitoring is to follow trends and extremes, that's what they're good for. All strips are well cut (unlike some other brands where you can get a few half strips) with good spacing between test pads. The app is a good, albeit very basic, way of keeping up with trends and that was one of the reasons for purchasing this product. The app is very easy to enter indicator tape values and each test has its own trend plot over time. This brings me to the issue I am having with the app and it has to do with their color chart versus the color chart shown on the bottle with a test strip. The app shows a similar color scale for most tests, but some are much less intuitive. My problems with the application are as follows: 1. The application shows 7 color variations for each test while the bottle shows a maximum of 6. Some tests (3) only have 5 variations per bottle.2. Unlike the bottle, the app does not show the relative numerical values for each color option. Displaying relative values in the application allows for more accurate conversion of cylinder values to application values.3. A test in the General Hardness app has a completely different color scheme than the bottle. The color of the applique changes from dark green to brown and then to dark red (7 options). The color of the bottle changes from light blue to dark purple (5 options).4. Why not lock valid ranges for each test in the application like it is on the bottle? Ultimately the test strips do what I need and they are way better than what I can make at any local store. . However, the app was a bit disappointing. I'm not sure why an app designed specifically for a specific product wouldn't fit the fundamentals of the two platforms they're trying to link. So from the bottle to the application.