Home / Chemicals / Pool / Chlorine/Bromine / 50lb bag of Sodium Bicarb (Alkalinity Increaser) View cart “20.6lb NST (Cal Hypo / Non Stabilized Tablet)” 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 Turbo Shock $10.99 $8.99 Add to cart Sale! 4.5lb NST Prime (Non Stabilized Tablet) $37.99 $34.99 Add to cart Enzyme Clarifier (Enzyme for Pools) $30.99 Add to cart 5lb Rapid Shock $34.99 Add to cart