Koralia NANO & EVOLUTION High Flow Power Heads by Hydor. The Koralia Nano  & Evolution  circulation pump offers the apex in efficiency and flow. Designed to work with wave timers, Koralia Evolution also feature extremely low power consumption and superior energy efficiency. With a smaller footprint than previous models, Koralia Evolution pumps blend seamlessly into your aquarium's backdrop. Koralia's patented magnet suction-cup technology is improved too: now featuring a vibration-absorbing element to minimize movement and support smoother flow.

Specifications:

240 Nano

• WATTS: 3.5W
• OVERALL DIMENSIONS: 2-1/2 in. x 2 in. dia.
• MAXIMUM FLOW RATE: 240 gph
• MAXIMUM TANK SIZE: Fresh - up to 28 gal./ Salt - up to 15 gal.

 425 Nano

• WATTS: 3.5W
• OVERALL DIMENSIONS: 2 in. x 4 in. dia.
• MAXIMUM FLOW RATE: 425 gph
• MAXIMUM TANK SIZE: Fresh - from 28 to 50 gal./ Salt - from 15 to 30 gal

750 Evolution

• WATTS: 4.5W
• OVERALL DIMENSIONS: 3 1/2 in. x 3 in. dia.
• MAXIMUM FLOW RATE: 1050 gph
• MAXIMUM TANK SIZE: Fresh - up to 90 gallon./ Salt - 50 gallon

1050 Evolution

• WATTS: 5.5W
• OVERALL DIMENSIONS: 3 1/2 in. x 6 in. dia.
• MAXIMUM FLOW RATE: 1050 gph
• MAXIMUM TANK SIZE: Fresh - up to 125 gallon./ Salt - 70 gallon

1400 Evolution

• WATTS: 6W
• OVERALL DIMENSIONS: 3 1/2 in. x 6 in. dia.
• MAXIMUM FLOW RATE: 1400gph
• MAXIMUM TANK SIZE: Fresh - from 90 to 160 gal/ Salt - from 55 to 90 gal