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There`s not a lot of information out there for genuine aeroponics as its more of a challenge than low or high pressure aero. Check your You Tube message box ;)
To my mind there are 3 types, low pressure (sprinklerponic) aero, high pressure aero and genuine aero. Folks tend to use whatever description of aeroponics that will fit with what they have :) A medialess flood and drain system that runs on a timer..could be called aeroponic because the roots are suspended in air?. Technically, they are not suspended in air with a film of water coating every root :)
Nice instructable. Imho, your description of aeroponics is incorrect. The roots shouldnt be sprayed with water, they should be suspended in a mist which consists of droplets in the 5-80 micron range. The mist is held at a constant level by adding very small amounts on a little and often basis. The roots are never wet or dry so they have constant access to oxygen and nutrients. If you spray the roots you create a film of water that holds a finite amount of oxygen and nutrient. The film blocks access to oxygen. If the nutrient in the film is depleted before the water, the plant has to wait for the next spray to create a new film...which also blocks access to oxygen, apart from what is dissolved in it. :)