Specifications:

• Calcite Neutralizer Cartridge BB20: PH Increase for 16,000 gallons or more PH+.
• REFILLABLE 20" Big Blue housing cartridge.
• When depleted, simply remove cap and refill with pure calcite
• Contains pure Calcite (calcium carbonate) made from crushed marble. This cartridge comes with the calcite.
• Calcite is certified for drinking water.
• Cartridge is 4.5" x 20" and fits Big Blue 20" housings.
• Depending on pH of untreated water cartridge may neutralize approximately 16000 gallons of water.
• Recommended flow rate is 2 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.