Home / Chemicals / Pool / Water Balancers / 4# pH Increaser “1lb Bag of Rapid Shock” has been added to your cart. View cart $11.99 4# pH Increaser quantity Add to cart SKU: 84455 Categories: Chemicals, Pool, Water Balancers Product ID: 4370 Description Description Raises pH in pool water. Related products Sale! 5lb Turbo Shock $42.99 Original price was: $42.99.$36.99Current price is: $36.99. Add to cart Enzyme Clarifier (Enzyme for Pools) $30.99 Add to cart Sale! 1lb Bag of Rapid Shock $6.99 Original price was: $6.99.$5.99Current price is: $5.99. Add to cart Sale! 5lb 1″ Chlorine Tablets $57.99 Original price was: $57.99.$54.99Current price is: $54.99. Add to cart