Freshwater Aquarium Fish

TEMPERATE WATER AQUARIUMS These are not heated, and ideally the water temperature should vary to the same extent that it does in nature (from 5 to 25 C, approximately). This is difficult, as room temperature barely falls below 15 C and is often over 18 C. Apart from this difference, the underlying principle is the […]

THE NITROGEN CYCLE This occurs in the same way in sea water and fresh water. In a marine aquarium the vegetation is often less abundant than in fresh water, and so the nitrates, the end products of the nitrogen cycle, will have a tendency to accumulate. At high doses these pose little danger to fish […]