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2. Fishless cycling - Wikipedia

   en.wikipedia.org/wiki/Fishless_cycling

   The nitrogen cycle in an aquarium. Fishless cycling takes place over a period of several weeks, during which the aquarist provides an ammonia source for the development of the nitrifying bacterial colony. Nitrifying bacteria in the aquarium grow on all surfaces, but particularly in areas of high water flow and high surface area such as the filter.

3. Aquarium filter - Wikipedia

   en.wikipedia.org/wiki/Aquarium_filter

   In the artificial environment of the aquarium, the nitrogen cycle effectively ends with the production of nitrates. In order that the nitrate level does not build up to a harmful level regular partial water changes are required to remove the nitrates and introduce new, uncontaminated water. [8]

4. Marine aquarium - Wikipedia

   en.wikipedia.org/wiki/Marine_aquarium

   As refugiums become more common in marine aquaria, nitrate levels are easily manageable for even the novice hobbyist. Ammonia and nitrite should be tested regularly; any detectable levels (i.e., over 0 ppm) can be indicative of a problem. Nitrates should not exceed 2 ppm in reef tanks, or 20 ppm in fish-only tanks.

5. Recirculating aquaculture system - Wikipedia

   en.wikipedia.org/wiki/Recirculating_aquaculture...

   All RAS relies on biofiltration to convert ammonia (NH 4 + and NH 3) excreted by the fish into nitrate. [4] Ammonia is a waste product of fish metabolism and high concentrations (>.02 mg/L) are toxic to most finfish. [5] Nitrifying bacteria are chemoautotrophs that convert ammonia into nitrite then nitrate.

6. Fishkeeping - Wikipedia

   en.wikipedia.org/wiki/Fishkeeping

   Nitrites are then further broken down into the less toxic nitrates which can be absorbed by aquarium plants and nitrates absorbing filter media. Aquarists also use water changes as a way to keep these toxins under control by removing water from the aquarium and vacuuming fish waste and food from the gravel and replacing it with fresh, treated ...

7. Berlin Method - Wikipedia

   en.wikipedia.org/wiki/Berlin_Method

   The Berlin Method of biological filtration is a method for maintaining a clean and stable environment within a saltwater aquarium, typically a coral reef system. This method relies on the use of ample live rock (rock with live marine organisms and bacteria on or in it).

8. Not All Nitrates Are Bad for You—These 9 Foods Are ... - AOL

   www.aol.com/lifestyle/not-nitrates-bad-9-foods...

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9. Community aquarium - Wikipedia

   en.wikipedia.org/wiki/Community_aquarium

   The processed ammonia is converted to nitrite, which is then processed to nitrate. Weekly water changes (25% of aquarium volume), while vacuuming debris from the bottom of the tank, can solve this problem of nitrate build-up, provided the tank is not overcrowded. Build-up of algae is largely related to light level and mineral imbalance.