Selecting Water Pumps
How do you go about selecting water pumps for an aquarium, aquaponic system or even hydroponic system? The choice of a pump can make a big difference between in the efficiency of the entire system. Aquarium Biz offers a good article on what you need to know when selecting water pumps.
You need to choose an affordable quality pump that produces the “desired flow at your required lift” at the lowest wattage.
Step 1: Determining Desired Flow Rate
Hydroponic Systems – typically flow through a single loop allowing a single pump and need a flow rate near 100 GPH for each grow bed loop up to 120 feet. Flood/drain beds – need 2 to 4 cycles per hour. Fish tanks – need a least one exchange per hour or extra oxygenation. Waterfalls – need 100 GPH for each inch of width.
The article then goes on to provide a number of steps to finalize the requirements that you actually need to consider when selecting water pumps for any purpose, including head and the importance of duty cycles.