Hardener

Calcium Hardener high-grade chemical flakes

Maintain correct calcium hardness to protect your spa fittings from corrosion, marble discolouration and prevent cloudy water. Dissolve in bucket of spa water, then add to water every time you fill your spa with fresh water.

Warning: Calcium Hardener is a poisonous chemical that must be kept well out of children’s reach. Always read the chemical handling label instructions.