Mr. Limpet
Aquarium Advice Addict
On the API Master test kit, you want to hold the tube "against" the white strip next to the chart you're reading. Be sure to have a good light source in front of the test card and no shadows on the tube.
Not sure about the API G/Kh test, I have the Nutrafin kit and I just add 1 drop between shakes until it changes color and then just count them up to ID my water hardness. IMO you really only need to do this testing on rare occasions, since you're using the same water source every time (in my case anyways).
Not sure about the API G/Kh test, I have the Nutrafin kit and I just add 1 drop between shakes until it changes color and then just count them up to ID my water hardness. IMO you really only need to do this testing on rare occasions, since you're using the same water source every time (in my case anyways).