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Goldfish generally like it high - above 7.0 pH and moderate to hard water. For most people that isn't a problem, but if you're in a soft water area, you may need to add a calcium carbonate based buffer (such as Malawi salt mix, you can Google that) to make the water chemistry right for goldfish.

Goldfish generally like it high - above 7.0 pH and moderate to hard water. For most people that isn't a problem, but if you're in a soft water area, you may need to add a calcium carbonate based buffer (such as Malawi salt mix, you can Google that) to make the water chemistry right for goldfish.