Color loss in German Blue Rams usually indicates stress or poor health. This stress can result from a variety of issues within their environment, including poor water quality, incorrect water parameters, diseases, inadequate diet, or even aggressive tank mates. Inappropriate temperature is also a major factor as German Blue Rams thrive in relatively warm water (25-29 degrees Celsius).
Addressing the potential source of stress can help regain the fish’s color. Test your water for parameters such as pH, temperature, ammonia, nitrite, and nitrate levels. Maintain a clean tank and feed a balanced diet to boost their immune system. You may need to isolate, treat or remove the cause of stress if it doesn’t resolve with these measures.