OK, so it's been years since I took a chemistry class. I'm doing my fishless cycle right now. And I have the test kit (I forget the brand name, starts with an 'A'), with test tubes and liquid not the paper test strips.
When comparing the the color of the liquid to the chart when testing the water I know your supposed to put the test tub up to the white back ground on the chart. But do you put the test right on the chart or do you hold it off the chart so that light can shine through? I get two different readings doing it each way, so I want to make sure I'm doing this right as my nitrites are spiking now and if I let the light shine through I'm a little over 2ppm if I put up against the chart I'm well over 5ppm.
Thanks!
When comparing the the color of the liquid to the chart when testing the water I know your supposed to put the test tub up to the white back ground on the chart. But do you put the test right on the chart or do you hold it off the chart so that light can shine through? I get two different readings doing it each way, so I want to make sure I'm doing this right as my nitrites are spiking now and if I let the light shine through I'm a little over 2ppm if I put up against the chart I'm well over 5ppm.
Thanks!