Metalfree is a highly effective metal chelating agent that protects against staining and discoloration from trace metals such as iron and copper. Metalfree should be used as part of a well-designed pool maintenance program. Metalfree does not raise phosphate levels in pool water like many other stain and scale products.
Directions:
Initial Dose: Add 1 bottle (1L) per 75,700 liters to the pool water evenly around edge.
Weekly Maintenance Dose: Each week, add 1 capful (120mL) per 38,000 liters to the pool water evenly around edge.
Do not exceed recommended dose.