The nitrogen cycle is the life support system of an aquarium. The cycle is a chain of chemicals and bacteria that are responsible for keeping the aquarium free of organic waste. Without an effective cycle, the tank becomes a toxic soup of chemicals that will harm or kill the inhabitants. To get a new aquarium ready for fish, it is essential to biologically mature the filter by encouraging the growth of highly specialized bacteria in the filter system. This process is vital for the safety and welfare of all aquatic animals.The salinity refractometer , aquarium refractometer or seawater refractometer is a important tool.
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