Home / Chemicals / Pool / Water Balancers / 4# pH Increaser “1lb Bag of NST Purify” 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! 4.5lb NST Prime (Non Stabilized Tablet) $37.99 Original price was: $37.99.$34.99Current price is: $34.99. Add to cart 1lb Bag of Non-Chlorine Oxidizer $12.99 Add to cart Sale! 35lb Instant Clear Chlorine Granules $321.99 Original price was: $321.99.$281.99Current price is: $281.99. Add to cart 1lb Bag of NST Purify $14.99 Add to cart