Macherey-Nagel
On demand
Macherey-Nagel test strips for nitrite, in 3 presentations covering different measuring ranges.
91311
91322
91367
A semi-quantitative test strip for nitrite, the unstable middle step between ammonia and nitrate. Dip it, wait the stated time, and compare the pad against the colour scale on the tube.
In an aquarium or a fish farm nitrite is acutely toxic — it blocks the blood's ability to carry oxygen. Its presence means the biological filter is not finishing its job, and it is the number that kills stock while nitrate is still fine.
A strip gives a range, not a figure. That is enough for the great majority of decisions — dose or do not dose, discharge or hold, keep running or stop — and it gives the answer where the sample is, in about a minute, with no instrument to calibrate and nothing to carry back to a laboratory.
When a number has to be defensible — a regulatory report, a dispute, a limit you are close to — a photometer or a laboratory method is the right tool. The strip's job is to tell you whether you need one.
A nitrite reading above zero in a running system is always worth acting on, even when it is far below the strip's top range.
Supplied in 3 presentations covering different measuring ranges. The range is chosen by model: 25, 3000.