Hth 67042 HTH 4LB Calcium Plus HTH, 4 LB, Calcium Plus, Increases Calcium Content Hardness Of Pool Water To Help Prevent Corrosion, Dry Granular Form, Active Ingredient Calcium Chloride 90-95%. HTH, 4 LB, Calcium Plus, Increases Calcium Content Hardness Of Pool Water To Help Prevent Corrosion, Dry Granular Form, Active Ingredient Calcium Chloride 90-95%.
