I've seen molybdate and nitrite, but at what range? I have the ability to test for very specific residuals, but does anyone know what the recommended range is? I would assume the Mo6 around 100ppm? sodium nitrite around 1,000ppm? I would think there is probably some tolytriazole in there at some amount to protect copper. pH above 8.5 for steel an below 9.5 for copper. I ordered a bottle of the VC-8 inhibitor to test it, but I am not paying $10 for 4 test strips when i can much more accurately test for inhibitor levels. Those who have the test strips, what exactly do they display when using them?