These brand new Solids Handling Pumps from Pond Kraft are highly cost-effective & easy to maintain. They are suitable for use in garden ponds fountains terraced fountains & indoor fountains to circulate & oxygenate clear water. Can accept up to 6mm solids. Please note that these pumps are not suitable for use in swimming pools. Water temperature should not exceed 35° Celsius (95° Fahrenheit). Model Max Flow @ 1m Head Lph Running Costs Watts Max Head Height 3500 2800 25 3.0 5000 3400 40 3.5 6500 3800 50 4.0 8000 5200 70 4.5 10000 6000 85 5.0