These symptoms are caused by rising ammonia levels in the blood.

Recent research has shown that some female carriers of the disease may become symptomatic with the disorder later in life, suffering high ammonia levels.

When your filter begins to mature, the ammonia levels will start to drop.

If this process is disturbed, ammonia levels begin to rise.

If ammonia levels are too high, nitrification must happen.

Treatments include immediately reducing the ammonia level through many small water changes.

Despite these improvements, ammonia levels in the river below the works were high, and fish populations did not survive.

Elevated ammonia levels or abnormal organic acids can indicate specific, rare types.

Blood tests (ammonia levels) may assist in the diagnosis.

It was note worthy that the ammonia levels in the lake greatly increased throughout the night.