Home / Chemicals / Pool / Chlorine/Bromine / 50lb bag of Sodium Bicarb (Alkalinity Increaser) View cart “Case of 4 – Oxidizer (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 20.6lb NST (Cal Hypo / Non Stabilized Tablet) $148.74 Add to cart 5lb Instant Clear Chlorine Granules $53.74 Add to cart 1lb Bag of Non-Chlorine Oxidizer $12.99 Add to cart 4.8lb 3″Chlorine Tablets $56.24 Add to cart