Calcium Soluble from The Soil Makers is a premium, 100% pulverized limestone calcium carbonate powder designed to lift calcium levels in hydroponic and soil systems—without adding magnesium. 38%; 95%; very low, making it ideal when soils are already high in magnesium; 97.0% passing at 100 mesh and 85% passing at 200 mesh, ensuring quick dispersion; fine, easy-to-dissolve powder suitable for soil mixes and hydroponic solutions; The Soil Makers — backed by hands-on soil science expertise. Why this matters: calcium is essential for strong cell walls, robust nutrient transport, and steady plant development. With a high Ca content and minimal magnesium, Calcium Soluble provides a concentrated calcium boost without unintentionally altering the soil’s magnesium balance. This makes it a reliable choice when soils already contain adequate or high magnesium levels, where dolomitic lime could tilt the balance unfavorably. Ideal use cases: Hydroponic systems needing a pure calcium source that won’t over-supply magnesium. Soil gardens and raised beds where magnesium is abundant and a calcium boost is required for fruiting crops, tomatoes, peppers, and leafy greens. Container gardening and potting mixes that call for a finely milled calcium carbonate amendment for steady calcium availability. What sets Calcium Soluble apart: it delivers reliable calcium with high purity and a predictable dispersion profile, helping you maintain calcium levels where they matter most while avoiding magnesium-driven side effects. Trust The Soil Makers to provide mineral amendments that support healthy root development, strong stems, and better nutrient uptake across your indoor and outdoor growing environments.This is a pulverized powder (calcium carbonate) - This high quality 100% pulverized limestone is high in calcium and very low in magnesium content. Superior to dolomitic lime when soil is already high in magnesium. Elemental calcium is 38%. Calcium carbonate equivalent is 95%. This product is 97.0 % passing at 100 mesh or 85% passing at 200 mesh.
