key Features:

• Designed for use will all Fluval Bio- CO2 Pro Low-Pressure CO2 Systems
• Produces CO2 within a short 24-hour period (when mixed with sugar - sold separately)
• Each Refill pack includes: 4 Activator Yeast sachets and 4 Booster tablets
• High-quality German Champagne yeast with stabilizers and nutrients for consistent quality
• Pre-measured for simple and accurate dosing
• Each Refill Pack provides long-lasting CO2 supply: Model 125 (up to 4 months), Model 250 (up to 2 months), Model 500 (up to 1 month)

Included:

• Activator yeast packets x 4
• Booster tablet packets x 4

Compatible with: A8460, A8463, A8466