Need I say that I'll buy a different brand next time? The general hardness test measures the levels of calcium and magnesium in the tank. As I have a heavily planted lightly stocked aquarium I don't expect nitrates to be a problem. Read the general hardness and carbonate hardness pads first by matching up the color with the color chart on the box. Thanks for the comment!
Grab a test strip, be careful to hold the strip by the end and do not to touch any of the pads.
The Beginner’s Guide to Aquarium Test Strips – And, Why They Suck!
These strips are faulty Date published: My chart got wet as I was comparing the colors on my first use. You get the idea! You can pick up a liquid test kit like this for half the price! Maintaining proper pH is one of the most important elements to keeping a successful aquarium. Found on now that it is a common problem very disappointed in the lack of available customer care.