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The 20-inch Big Blue 1-micron carbon block filter is WQA certified to NSF/ANSI industry standards and is specialty formulated for the reduction of chloramines. This carbon block filter outperforms standard carbon block filters as well as granular activated carbon cartridges in chloramine and chlorine reduction.
- 1 Micron nominal rating
- Specially formulated for chloramine reduction
- WQA certified
- Fits all Big Blue 20 Inch Housings