Continue shopping “ORIGINAL PoolRx Black Booster Mineral Unit 20K – 30K gallons – 4 Pack” has been added to your cart. Product Price Quantity Total × ORIGINAL PoolRx Black Booster Mineral Unit 20K – 30K gallons - 4 Pack $153.98 ORIGINAL PoolRx Black Booster Mineral Unit 20K – 30K gallons - 4 Pack quantity $153.98 Cart totals Subtotal $153.98 Shipping Shipping costs will be calculated once you have provided your address. Total $153.98 Proceed to checkout — OR — Calculate shipping Country / region: Select a country / region… United States (US) State / County: City: Postcode / ZIP: Update