To calculate the right pump size, you will need to know:
The total GPH (gallons per hour) of water that will be flowing through your system
Hydroponic systems generally need to turn over the total system volume twice per hour.
The head height (the distance between the top of the tank water level and the highest point of irrigation, measurable with a measuring tape)
Aquaponic systems generally need to turnover system water 7-10 times per hour, depending on stocking density of fish and filtration.
Then, decide on a submersible or inline pump.
Once you know these two numbers, sort your system into one of two categories:
Less than 1000 GPH needed total for your system flow rateIf this is you, you will use a submersible pump.
Over 1000 GPH needed total for your system flow rateIf this is you, you will need an inline pump.
Then, decide on the model size you need.
For submersible pumps:
Compare the total GPH and the head height on the sizing chart for your pump brand.
For inline pumps:
A 1/2 horsepower (HP) inline pump can serve 250-400 ZipGrow Towers.
For large-scale DWC, NFT, and Bato bucket systems contact the manufacturer.