White spots on a goldfish, especially if they look like grains of salt, are highly indicative of Ichthyophthirius multifiliis, commonly known as 'Ich' or white spot disease. This is a common and highly contagious parasitic infection in freshwater fish. If left untreated, it can spread rapidly and be fatal. Treatment typically involves raising the tank temperature slightly (if appropriate for the species), adding aquarium salt, and using an over-the-counter Ich medication. It's also important to maintain good water quality to prevent further stress. Speak to Dial A Vet via a video consult should you need further guidance.Clinically Approved Standard by Dial A Vet Veterinary Team
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