Medications

Fish diseases often start with stress. Adding a new fish, temperature swings or deteriorating water weaken resistance, and pathogens that are always present in the water get their chance. That is why you should check the water values before starting treatment.

Whitespot, velvet, fungal and bacterial infections and parasites each need different active ingredients. Watch whether the fish rubs against objects, breathes fast, clamps its fins or loses its appetite, and whether the marks are white dots, a golden dust or a cotton-like coating. The more precisely the disease is identified, the less need to try several products in a row.

Keep aeration strong during treatment, because a sick fish needs more oxygen. Do not stop the course when symptoms fade; finish it as the instructions say. After treatment, change some water and add bacteria if needed.