Good point on the high or low pressure.High or low pressure aeroponics? If you wanna try high pressure get an aquatec 6800 or 8800. You can get misters and connectors from multiponics.com. Im giving it my first shot and it's pretty dang cool.
I pretty much covered that.it depends on your setup, how high up your going from the pump, and how many sprayer heads.
I have to apologize I don't have to many specifics at the moment so I'll answer your questions as best I can for now. Right now I have an 25 site cloner in an 18 gallon tote just as an experiment. I got some nozzles from home depot and I have a 250GPH mag-drive pump that was laying around. So far I'm impressed with the results. But upon doing some reading I find out that I should be using a high pressure low volume pump instead of my high volume low pressure pump.How big is your system? Pumps come in different sizes and have different flow rates, so, obviously you don't want too small of a pump.
That being said, I just need some more info on what kind of hydro setup you want to run. Some water pumps efficiency are reduced when pumping vertical. So, is it a horizontal run like a bucket system or a vertical setup like a flood table?
I have plenty of answers for you if you're willing to get more specific on this post. I'll sub to this thread as well so I can help out.