What does goldfish waste look like?

Goldfish stool can be a variety of colors and sizes. Healthy goldfish stool will be full/long and usually a brown color. Unhealthy goldfish stool may be clear, white, or red- which is an immediate sign that your fish is sick. Also, a lack of stool can indicate a health problem such as constipation. To keep your fish's digestive health and stool normal, try feeding the fish peas once or twice a week.