Continue shopping “PoolRx Black Booster Mineral Unit 20K – 30K gallons – 4 Pack” has been added to your cart. Product Price Quantity Total × PoolRx Black Booster Mineral Unit 20K - 30K gallons - 4 Pack $153.96 PoolRx Black Booster Mineral Unit 20K - 30K gallons - 4 Pack quantity $153.96 Cart totals Subtotal $153.96 Shipping Shipping costs will be calculated once you have provided your address. Total $153.96 Proceed to checkout — OR — Calculate shipping Country / region: Select a country / region… United States (US) State / County: City: Postcode / ZIP: Update