Full Spectrum Products Calcium is a product that is like basic calcium product competitors except it's carbon-based and not chloride based. Calcium chloride can be detrimental to soils.  While calcium chloride may be cheaper, it's not as efficient.  Having a surfactant helps the efficiency, by moving through the soil profile while opening the soil for better aeration and water movement.  This is beneficial for plant uptake and growth. 

Sold in ½ gallons