Velvet Treatment – Since velvet parasites receive a portion of their energy from photosynthesis, cover the aquarium with a blanket and turn off the aquarium lights during treatment. Raise the water temperature to 80°F (26°C). This wil quicken the parasite’s life cycle. Add ½ teaspoon of aquarium salt per gallon of water and remove the active carbon from the filter. Remove any invertebrates from the aquarium and treat the water with MardelCopperSafe for 10 days. Some goldfish hobbyists also recommend Mardel Quick Cure as an alternative. Once you’ve finished treatment, do a 25% water change and continue routine water changes as usual.