Several factors could be causing goldfish plant distress, including overwatering, under watering, lack of humidity, poor soil drainage, too much direct sunlight, or nutrient deficiencies. Check for signs such as yellowing leaves, wilting, or brown edges, then adjust care accordingly. Proper care includes bright, indirect light, consistent watering after the top inch of soil dries out, and high humidity. Ensure the pot has good drainage and use a well-draining soil mix.