How much of this bath salt should I use for a full bath, and is it different for a foot soak?

For a standard full bathtub, a typical starting point is 100–150 grams of salt, which is roughly a large handful or half a cup. The goal is to dissolve enough bishofit (the magnesium chloride mineral source) to create a pleasant, mineral-rich environment in the water. You can adjust this amount based on personal preference for mineral concentration and scent intensity from the pine needle oil. For a foot bath or hand soak, using a much smaller amount—about 30–50 grams (or a heaped tablespoon)—is sufficient to achieve a similar mineral effect in a smaller volume of water. Since the product disperses well in warm water, ensure you stir or swish the water a few times as the salt dissolves. Using more than the suggested amount is not harmful but may leave a slightly slicker feel on the skin due to the higher mineral content. Always start with a lower amount if you have sensitive skin to see how your skin responds.