HIGHER CAL

Price: £8.50 + £2.75 P&P

Guardex Spa higher cal is used to raise calcium hardness in spa water. Surfaces etched by low calcium hardness will become more abrasive and uncomfortable for bathers. Rough surfaces also increase problems with algae and makes cleaning more difficult..

It is important for a spa that along side PH/alkalinity hardness is kept at correct levels.

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