What are the signs of ammonia poisoning in goldfish?

Ammonia poisoning is a common problem for goldfish, as they are particularly sensitive to this toxin. Some common signs of ammonia poisoning in goldfish include:

- Lethargy.

- Loss of appetite.

- Red or irritated gills.

- Gasping at the surface of the water.

- Increased mucus production.

- Swimming in an erratic or uncoordinated manner.

- Lying on the bottom of the tank.