St. Cyr Stain Preventer 1qt

St. Cyr Stain Preventer 1qt for pools is a stain and scale control product formulated to prevent and remove unsightly stains and scale caused by metals like iron, copper, and manganese, as well as high calcium hardness, in swimming pools. This type of sequestering agent is especially important when filling your pool with tap water, which may contain these metals and minerals that can discolor water and stain pool surfaces.

Key Features and Benefits

Prevents and removes stains caused by iron, copper, manganese, and other metals
Controls scale buildup and helps eliminate freshly formed scale on pool surfaces
Protects pool equipment and surfaces from mineral and metal damage
Supports consistently clear, clean water
Regular use is ideal after filling, topping up, or heavy rain dilution

Usage and Application

Add Stain Preventer when filling or topping off the pool to sequester metals before adding chlorine or bromine
Circulate water continuously for 24 hours after addition
Typical dosage: 1 quart treats about 10,000 gallons of pool water for initial dosing; refer to label for maintenance dosage and exact application per pool volume
For ongoing protection, add monthly or as directed, especially in areas with high metal or calcium content

Best Practices

Run pool filter and circulation during treatment to ensure even distribution
For pools with existing stains or heavy scale buildup, brushing affected surfaces and using the product in combination with a stain remover can help restore appearance
Maintain balanced water chemistry and avoid overdosing or mixing with incompatible chemicals

St. Cyr Stain Preventer 1qt helps reduce maintenance by targeting the root causes of staining and scaling, preserving both the look and longevity of your pool.

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