Mor-Cal is used to raise calcium hardness in pool and spa water, helping protect surfaces and equipment from corrosion. Maintaining proper calcium levels prevents etching on liners, plaster, and heaters while supporting balanced water chemistry. This easy-to-use, fast-dissolving formula is ideal for routine water care.
Suitable for pools and hot tubs.
Key Benefits
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Raises low calcium hardness
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Helps prevent corrosion and surface damage
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Protects equipment and finishes
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Easy granular application
Available at Swim & Spas—your local water care experts.
