Bacterial Cysts
Bacterial Cysts are quite common in Goldfish. Usually, poor water quality is the cause but other stressors can cause bacterial cysts. They are easily treated, but shouldn't be ignored. They appear as small, white zit like spots. Usually only one or two at a time.
Treatment
☆ Water change, water change, water change.
☆ Ensure your water is of the best quality. Daily changes can aid healing. If your tank and tap pH differ by more than 0.5, perform 50% changes maximum.
☆ Increase surface agitattion to ensure the water is oxygen rich.
☆ Keep an eye on the cyst. If it bursts, the fish is open to infection. Raise the salinity to 0.1% (0.1% = 1 gram per litre/1 teaspoon per gallon).
☆ Ensure your water is of the best quality. Daily changes can aid healing. If your tank and tap pH differ by more than 0.5, perform 50% changes maximum.
☆ Increase surface agitattion to ensure the water is oxygen rich.
☆ Keep an eye on the cyst. If it bursts, the fish is open to infection. Raise the salinity to 0.1% (0.1% = 1 gram per litre/1 teaspoon per gallon).