Originally Posted by Mako_
What are the readings for Nitrate and Nitrite suppose to be around?
Nitrite readings should always be 0ppm unless the tank is cycling. Nitrate readings can vary, anywhere between 0ppm (usually only in a planted tank, but certainly possible otherwise with good maintenance) up to 40-60ppm ("safe" level really depends on who you ask, though above 20 usually means you need to do something different)... and of course ammonia should be 0ppm as well unless cycling
You'll probably see them from the google search HN1 posted, but if you dont, there are a couple articles in my signature detailing cycling and an overview of the nitrogen cycle
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