Home / Chemicals / Pool / Chlorine/Bromine / 50lb bag of Sodium Bicarb (Alkalinity Increaser) View cart “1lb Bag of Rapid Shock” has been added to your cart. $69.99 50lb bag of Sodium Bicarb (Alkalinity Increaser) quantity Add to cart SKU: AAA-8604 Categories: Chemicals, Chlorine Free, Chlorine/Bromine, Clarifiers/Maintenance, Pool Product ID: 2220 Description Description Used to increase the Alkalinity in Pool Water. Related products Sale! 1lb Bag of Rapid Shock $6.99 $5.99 Add to cart Sale! Box of 12- 1 lb Bags of Turbo Shock $131.99 $86.99 Add to cart Sale! Box of 12- 1 lb Bags of Rapid Shock – $89.99 $62.99 Add to cart 1lb Bag of Non-Chlorine Oxidizer $12.99 Add to cart