{"product_id":"tropical-test","title":"Tropical Test NO2 Nitrite \u0026 Nitrate Test Kit","description":"\u003cp\u003eThe Tropical Test NO2 range covers two of the most critical water quality parameters in any freshwater or saltwater aquarium: nitrite (NO2⁻) and nitrate (NO3⁻). Available as two separate variants, these drop-based colorimetric test kits give keepers a clear, reliable reading of nitrogen compound levels — information that is essential for maintaining a healthy aquatic environment.\u003c\/p\u003e\u003ch3\u003eWhat These Tests Measure\u003c\/h3\u003e\u003cp\u003eThe nitrite variant measures NO2⁻ concentration across a range of 0–3.3 mg\/L, while the nitrate variant covers NO3⁻ levels across a range of 0–100 mg\/L. Both tests are suitable for use in freshwater and saltwater aquariums, making them versatile across a wide range of aquatic setups.\u003c\/p\u003e\u003ch3\u003eHow to Use\u003c\/h3\u003e\u003cp\u003eBoth kits use a straightforward drop-by-drop reagent method. Add the reagent solution to your water sample one drop at a time until the sample changes colour, then compare the result against the included colour scale. No specialist equipment is needed — results are clear and fast.\u003c\/p\u003e\u003ch3\u003eWhy Nitrogen Levels Matter\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eNitrite is produced as bacteria break down fish waste, uneaten food, and other organic matter in the aquarium.\u003c\/li\u003e\n\u003cli\u003eEven low concentrations of nitrite are highly toxic to fish — the target reading should always be zero.\u003c\/li\u003e\n\u003cli\u003eNitrite spikes are most common in newly established tanks, overstocked systems, or following treatment with bactericidal agents.\u003c\/li\u003e\n\u003cli\u003eMonitoring nitrate levels alongside nitrite gives a fuller picture of the nitrogen cycle and overall water quality.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eChoosing the Right Variant\u003c\/h3\u003e\u003cp\u003eSelect the nitrite (NO2) test if you are monitoring a new tank cycle or investigating unexplained fish health issues. The nitrate (NO3) test is the go-to for routine maintenance checks and assessing the effectiveness of your filtration and water change regime. Many keepers run both as part of a regular testing routine.\u003c\/p\u003e\u003cp\u003eUsed together, the Tropical Test NO2 range gives aquatic keepers the data they need to act before water quality becomes a welfare issue — not after.\u003c\/p\u003e","brand":"Peregrine","offers":[{"title":"Nitrite (NO2)","offer_id":54176457883985,"sku":"1VTK010","price":14.91,"currency_code":"GBP","in_stock":false},{"title":"Nitrate (NO3)","offer_id":54176457916753,"sku":"1VTK015","price":14.91,"currency_code":"GBP","in_stock":false}],"url":"https:\/\/viperia.co.uk\/products\/tropical-test","provider":"Viperia UK","version":"1.0","type":"link"}