Seachems Gold Salt is designed to provide the optimal environment for all goldfish species. The salt is also well suited for routine aquarium freshwater use. It does not impact pH or provide buffering. for pH control use Gold Buffer. for dechlorination use Prime. DIRECTIONS: Use when setting up an aquarium and when making water changes. To add salt to an established tank do so gradually. It is best to predissolve the salt in a small amount of freshwater before use. Avoid using salt when replacing evaporated water. Using the enclosed dispenser add 1 level scoop (0.5 g) for each 1 L (1 quart). 70 g/ 2.5 oz. (Treats 160 L (40 US Gallons).