Continue shopping “AquaChek Pool Spa Total Dissolved Solids TDS Test Strips 561683” has been added to your cart. Product Price Quantity Total × AquaChek Pool Spa Total Dissolved Solids TDS Test Strips 561683 $11.89 AquaChek Pool Spa Total Dissolved Solids TDS Test Strips 561683 quantity $11.89 Cart totals Subtotal $11.89 Shipping Shipping costs will be calculated once you have provided your address. Total $11.89 Proceed to checkout — OR — Calculate shipping Country / region: Select a country / region… United States (US) State / County: City: Postcode / ZIP: Update