8kg Calcium Plus (Calcium Chloride)
Ideal range of hardness is between 150-300 ppm, ideally between 200 - 300 p.p.m. Calcium Up is pH neutral. Calcium levels being too high in pool water can lead to scale formation, clogged filters/heaters, reduced circulation and skin/eye irritation, where as too low calcium levels leads to etching, staining, heater failure and/or corrosive water.