Mitsuru Aquarium NO₂ Test – drop-count water test

This drop test is aimed at aquarists who want to check nitrite levels in their tank, especially during cycling, after filter changes, or when fish look unwell. Nitrite is one of the key markers of biological filtration, so a reliable home test helps catch problems before they threaten the stock.

Why it matters

• Dedicated nitrite measurement: the kit is designed specifically for NO2 in aquarium water, so the result refers to the parameter that signals the state of the nitrogen cycle.
• Targeted use moments: the manufacturer points to aquarium start-up, restarts, larger filtration changes and deteriorating fish condition as times when checks are most useful.
• Early warning of filter issues: elevated NO2 may indicate immature or disturbed biological filtration, which makes regular testing a way to spot the cause early.
• Complete measuring set: each kit contains the reagents and the accessories needed for the measurement, such as measuring containers, syringes, test tubes, measuring spoons and a colour comparison scale, together with instructions.

Specifications

• Brand: YOKUCHI
• Model: Mitsuru Aquarium Test NO2
• Symbol: YOKUCHI MITSURU NO2
• EAN: 5903137563057
• Test type: drop test (liquid reagents)
• Measured parameter: nitrites (NO2)

What it works with

The test belongs to the water chemistry and testing category of aquarium equipment and is intended for freshwater and other aquarium setups where nitrogen cycle monitoring is needed. It suits both new tanks being cycled and established aquariums that are checked after maintenance or a change in stock condition. Since the supplied data does not specify tank volume or compatible species, check the instructions for details before use.