Specifications:

• Calcite Neutralizer Cartridge BB20: PH Increase 16000 gal PH+.
• 20" Big Blue housing cartridge.
• Contains pure Calcite (calcium carbonate) made from crushed marble.
• Calcite is NSF certified for drinking water.
• Cartridge is 4.5" x 20" and fits Big Blue 10" housings.
• Depending on pH of untreated water cartridge may neutralize approximately 16000 gallons of water.
• Recommended flow rate is 1 gallon per minute.
• Maximum flow rate is 5 gallons per minute.
• Generally not recommended for whole-house applications, unless the flow rate and water usage is very low.