Check the listing for details. Natural Chemistry METALFree Pool Metal Chelating Agent 1 Liter Bottle. Color: Marine Blue, Condition: New. Listed at 29.99 USD. Natural Chemistry's METALfree is a highly effective chelating agent that prevents staining and discoloration from trace metals such as iron and copper. METALfree also prevents scale build-up due to calcium and other minerals. These trace metals and minerals may already be in the pool water or in the fill water. It should be used as part of a well designed pool maintenance program where local water requires it, or where well water is the pool water source.Please Note: METALfree does not contain phosphonic acids and will NOT raise phosphate levels in pool water.Initial Dosage:Add 1 bottle per 20,000 gallons to the pool water evenly around edge.Weekly Maintenance Dosage:Each week, add 1 capful (4 oz) per 10,000 gallons to the pool water evenly around edge. Powered by Frooition Frooition | No-js Template | eBay design, eBay store design, eBay shop design, eBay template design, eBay listing design (ver:froo_no_js) This listing is currently undergoing maintenance, we apologise for any inconvenience caused.Natural Chemistry's METALfree is a highly effective chelating agent that prevents staining and discoloration from trace metals such as iron and copper. METALfree also prevents scale build-up due to calcium and other minerals. These trace metals and minerals may already be in the pool water or in the fill water. It should be used as part of a well designed pool maintenance program where local water requires it, or where well water is the pool water source.Please Note: METALfree does not contain phosphonic acids and will NOT raise phosphate levels in pool water.Initial Dosage:Add 1 bottle per 20,000 gallons to the pool water evenly around edge.Weekly Maintenance Dosage:Each week, add 1 capful (4 oz) per 10,000 gallons to the pool water evenly around edge. Powered by Frooition Frooition | No-js Template | eBay design, eBay store design, eBay shop design, eBay template design, eBay listing design (ver:froo_no_js) This listing is currently undergoing maintenance, we apologise for any inconvenience caused.