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Clear, Perfect Water with half the work! This powerful formula prevents winter waterline ring, preserves pool liners and finishes, and reduces staining and the need for acid washing.
Applying Pool Magic when closing your pool in the fall provides a residual level of enzymes in your water over the off-season, which prevents water line rings from forming. Refilling the pool upon opening in the spring dilutes the enzyme concentration, so the additional spring or opening dose is necessary for fresh fill water.