Z-6 Sizing Recommendations Light Bioload: 80 gallons Medium Bioload: 65 gallons Heavy Bioload (most common): 40 gallons Specifications Footprint: 6.3" x 3.9" Height: 18.9" Recommended Water Height: 8" Pump Model: DSP 1000 24V DC pump Power Consumption: 13 Watts @120VAC, 60Hz