Suds Online hardness increaser is convenient and easy to use. It will quickly
increase the calcium hardness in your pool, hot tub or spa water.
Low hardness can corrode your pool, hot tub or spa plumbing and
heaters as well as staining or etching the surface.
Water hardness should be kept between 100- 250 ppm for acrylic finish, and 250-450 ppm for plaster finish
To increase hardness of a 10,000l pool by 50ppm add 750g of Hardness Increaser
Spa and Hot Tub
To Increase hardness of a 1000l spa by 50ppm add 75g Hardness Increaser