Continue shopping “PoolRx Black Booster Mineral Unit 20K – 30K gallons” has been added to your cart. Product Price Quantity Total × PoolRx Black Booster Mineral Unit 20K - 30K gallons $42.98 PoolRx Black Booster Mineral Unit 20K - 30K gallons quantity $42.98 Cart totals Subtotal $42.98 Shipping Shipping costs will be calculated once you have provided your address. Total $42.98 Proceed to checkout — OR — Calculate shipping Country / region: Select a country / region… United States (US) State / County: City: Postcode / ZIP: Update