pHusion Calcium Sulfate is a pelletized calcium sulfate that is reacted with an organic acid. This unique organic acid is a combination of Calcium Lignosulfonate and Lignosulfonic Acid. pHusion Calcium Sulfate releases calcium dramatically faster than non-reacted gypsum, which means that it works faster. When pHusion Calcium Sulfate is dissolved by water, the organic acid accelerates the reaction of releasing available Calcium and Sulfur in the soil. The Calcium Lignosulfonate and Lignosulfonic Acid convert the calcium in pHusion Calcium Sulfate into a more soluble form, readily available for plant uptake. pHusion Calcium Sulfate addresses both the calcium and sulfur needs of the plant. Use when calcium is required and you don’t want to increase the soil pH. pHusion Calcium Sulfate will help achieve a uniform calcium profile throughout the soil.