Just received my Aquarium co-op Test strips last night. Tested my water and all of the test results agreed with my API Master, GH/KH, Chlorine test kits - except the GH. The color on the GH looked magenta (more red) than any of the colors on the chart. After about 5-10 minutes it looked like the edges of the pad were starting to change to a more correct color (at this point pH, KH were no longer even close).
My API kit measures my GH at 196.6 ppm (11 drops).
I did the 3 second swirl and 1 minute lay flat - on the bottle as shown in the picture.
