Home / Chemicals / Pool / Chlorine/Bromine / 50lb bag of Sodium Bicarb (Alkalinity Increaser) $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 Sale! 50lb 3″ Chlorine Tablets $299.99 $249.99 Add to cart Sirona Chlorine/Bromine Spa Test Strips – 25 Count $15.99 Add to cart Sale! 4.5lb NST Prime (Non Stabilized Tablet) $37.99 $34.99 Add to cart