Salifert- nitrite test.

Accurately determines the content of nitrites in sweet, salty, eighth water or in garden lakes.

Nitrites turn into nitrates into properly cycling aquariums. The nitrate formed thus formed is transformed into a harmless nitrogen gas (denitrification/nitrogen cycle). Before transforming into nitrogen gas, however, nitrate turns back into nitrite and, If for some reason the nitrogen cycle cannot be completed, toxic nitrite remains in the system.

Around 60 the test in sweet or salt water.