Iluka Hardup

Iluka Hardup increases the Calcium Hardness level in spa and hot tub water. Water which is low in calcium can corrode equipment, etch concrete and grouted surfaces, and provide an environment favourable to algae growth. The Calcium Hardness level of a spa and hot tub should always be maintained between 200 and 275 ppm for concrete and tiled spas and hot tubs, and between 175 and 225 ppm for other surfaces.

Let us test your spa or hot tub water to assist you in maintaining healthy water. Our water test service is free in store now.