Home / Chemicals / Pool / Chlorine/Bromine / 50lb bag of Sodium Bicarb (Alkalinity Increaser) “4.8lb 3″Chlorine Tablets” has been added to your cart. View 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! 11lb MPT Extra Chlorine Tablets $119.99 Original price was: $119.99.$99.99Current price is: $99.99. Add to cart Clean Shock $12.99 Add to cart Sale! Box of 12- 1 lb Bags of Rapid Shock – $95.99 Original price was: $95.99.$77.99Current price is: $77.99. Add to cart Sale! 4lb MPT Extra Chlorine Tablets $54.99 Original price was: $54.99.$44.99Current price is: $44.99. Add to cart