This is my first attempt at high pressure aeroponics. All 12 votes. Water pressure 115 psi. Six misters size .025 on a timer to go off 1 second on and 200 off = 5 gallons of solution every week (Run to waste). ppm 750 max (500 scale). GH nutrients Put outside on July 22 One month later August 22 September 27 Today October 27 I had run into one problem. Witch was root aphids. They totally devoured soooomuch roots. This started late September Before ( beginning of flour ) Now ( Full infestation ) What do you all think about my first grow