Poolstar Pool Chloride Calcium 2kg SKU: 065356 MODEL: ASF4550 Error. try again later You've successfully joined the club $ 19 .98 each Available on orders $50 to $1500. More info × Mitre 10 SAvailable at selected stores. Check your local store for details Variants Low calcium hardness leads to corrosion of pool fittings and stains. Features and benefits Increases calcium hardness.