What is the proper ammonia level in saltwater tanks?

In a saltwater aquarium, the ideal ammonia level should be zero parts per million (ppm) at all times. Ammonia is highly toxic to fish and other aquatic life, even in small concentrations. It is produced as a waste product by fish, invertebrates, and bacteria in the aquarium, and it can accumulate if not properly filtered and removed. To maintain healthy water conditions and protect the inhabitants of the tank, regular water testing is crucial, and immediate action should be taken to address any detectable ammonia levels by optimizing the filtration system and performing water changes as needed.