Home / Chemicals / Pool / Chlorine/Bromine / 50lb bag of Sodium Bicarb (Alkalinity Increaser) View cart “10lb NST (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 5lb Rapid Shock $34.99 Add to cart Frog Torpedo Pack 6-pack $249.99 Add to cart Sale! 20.6lb NST (Cal Hypo / Non Stabilized Tablet) $139.99 $118.99 Add to cart Sale! 35lb Instant Clear Chlorine Granules $321.99 $281.99 Add to cart