What happens when the ammonia level is high in the fish tank?

When ammonia levels are high in a fish tank, it can lead to toxic conditions for the fish, causing stress, reduced immune function, and potentially fatal gill damage. Symptoms of ammonia poisoning include gasping at the surface, lethargy, and abnormal swimming behavior. High ammonia levels typically indicate an imbalance in the nitrogen cycle, often due to overfeeding, insufficient filtration, or inadequate tank maintenance. Regular water testing and immediate corrective actions, such as partial water changes, are crucial to mitigate the effects.