Fritz RPM Calcium Buffer System – Part 1: Liq Alkalinity

Fritz RPM Calcium Buffer System – Part 1: Liq Alkalinity (High-Purity)

Fritz RPM Part 1 Alkalinity delivers concentrated carbonate buffering without unnecessary ions or metals. Essential for reef and marine tanks, it supports pH stability and buffering capacity when used with Part 2 Calcium.

Features & Benefits

• Highly concentrated—1 mL raises alkalinity by ~2.1 dKH per US gal
• Contains only sodium bicarbonate & carbonate in deionized water; no added trace elements
• Perfectly pairs with Part 2 Calcium for balanced ionic support
• Safe for precise dosing systems and manual use
• Clean formula ideal for professional and hobbyist reefers

Usage & Dosage

• Adjustment dose: 1 mL per gallon = +2.1 dKH (~5 mL per 10 gal = +10.6 dKH)
• Maximum of 5 mL per 10 gal per day; avoid causing >0.2 pH unit shift
• Routine dosing: After reaching 8–11 dKH, use 5 mL Pt 1 + 5 mL Pt 2 per 20 gal daily
• Add into a sump or high-flow area; allow mixing time before testing
• Observe livestock after dosing; if cloudiness appears, wait before adding Pt 2
• Ensure magnesium levels are sufficient—use RPM Liquid Magnesium first if needed

Available Sizes