What is the common name for the condition caused by high ammonia levels in tanks?

The condition caused by high ammonia levels in aquaria is commonly referred to as ammonia poisoning. This term describes the harmful effects of ammonia on aquatic organisms, particularly fish, when they are exposed to elevated concentrations in the water. Ammonia is a toxic waste product produced by the metabolism of fish and the decomposition of organic matter. When levels exceed safe thresholds, it can cause damage to fish gills, leading to respiratory distress, nerve damage, and even death if not addressed promptly.

While ammonia toxicity is also a valid term used in veterinary and aquatic biology contexts, ammonia poisoning is the more commonly recognized phrase found in literature and discussions regarding the health impacts on fish. It emphasizes the direct adverse effects of ammonia on aquatic life.

The other options, such as oxygen depletion and water cloudiness, do not specifically address the toxic effects resulting from high ammonia levels. Oxygen depletion refers to a reduction in dissolved oxygen, which can cause stress or suffocation in fish but is a separate issue. Water cloudiness often results from various factors, including overfeeding, excessive waste, and algal blooms, but does not directly correlate with the toxic effects of ammonia. This clearly delineates ammonia poisoning as the appropriate and commonly accepted term for the condition in question.