Big Blue 20-inch pH Filter

The Big Blue 20" pH filter contains a blend of calcite and corosex that dissolves slowly in water to neutralize acid. It also contains GAC for optimal flow and treatment of tastes and odors. Product Features pH Filter This filter is designed to treat low pH levels found in acidic water, commonly seen as blue/green staining and corrosion of pipes. Blended for performance This filter contains 40% calcite, 40% GAC, and 20% corosex to ensure good flow rates while still providing excellent treatment of low pH levels. Big Blue 20" Filter measures 20-inch long and 4.5-inch in diameter. Standard Big Blue Size Fits in all standard 20" Big Blue filter housings. Product Description The Big Blue 20" pH filter contains a blend of calcite and corosexthat dissolves slowly in water to neutralize acid. It also contains GAC for optimal flow and treatment of tastes and odors.