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Hardness Increaser 4kg - East Coast Pool Supplies

Pool Hardness Increaser 4kg

$35.00
$35.00
Sold out
Tax included.

4kg packet of Hardness Increaser to raise the calcium level in pool water.

  • Raises total hardness in swimming pool and spa water.
The Pool Hardness Increaser 4kg is a sensational customer favorite, and we hope you like it just as much.

Inventory Last Updated: Jul 26, 2026