Click to expand Tap to zoom Metal Free Save Liquid error (product-badge line 32): -Infinity% $28.00 | / 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart METALfree is a highly effective chelating agent that prevents staining and discoloration from trace metals such as iron and copper. Phosphate free! Powerful formula chelates iron, copper, and other trace minerals. Protects against surface staining and water discoloration caused by metals in pool water. Protects against calcium and mineral scale buildup.