Pool Calcium Increaser, 4-Lbs. Ridge Tool Works on a variety of

Works on a variety of surfaces and textures

1-1/2-Inch x 12-Inch Brass Continuous Hinge

and millions of vibrant colors to enhance any space – no hub needed

When finished in Antique Brass

65W Maximum

Pool Calcium Increaser, 4-Lbs. Ridge Tool Works on a variety ofHTH(TM) calcium hardness increaser, 4 lbs., is used to raise the calcium hardness of swimming pool water. Low calcium hardness may cause the pool water to be corrosive, resulting in damage to pool surfaces and equipment. Plaster finish pools may be etched or stained if the calcium hardness of the pool water is not properly adjusted. The calcium hardness of chlorinated pool water should be maintained in the range of 200 500 ppm.