Synonym: Cal Plus，Water hardness
Chemical: Calcium Chloride
Appearance: Flake/Pellet
Ingredient:CaCl2:74% / 77% / 90% / 94%
Features:Hardness Increaser is used to raise the calcium hardness level in the pool to the ideal range. Prevents water from becoming corrosive and damaging pool’s plumbing and heater. Stops staining and etching of pool surfaces caused by low hardness levels. 
Size:
0.5kg(or 1lb),1kg(or 2lb),2kg(or 5lb),3kg,4kg(or 10lb),8kg and 10kg of Pillow Bags,Doy Packs,Gusseted Bags and etc.
0.5kg (or 1lb),1kg (or 2lb),2kg (or 5lb),3kg,4kg (or 10lb),8kg and 10kg of Pails, Jars, Jugs,Pots,Tubes,Drums and etc. 
25kg or 50lb bags