Does the presence of nitrates affect water quality?
Unlike temperature and dissolved oxygen, the presence of nitrates usually does not have a direct effect on aquatic insects or fish. However, excess levels of nitrates in water can create conditions that make it difficult for aquatic insects or fish to survive. Algae and other plants use nitrates as a source of food. If algae have an unlimited source of nitrates, their growth is unchecked. So, why is that a problem?
