you see a lotta bullshit on the net bro. all over these and every forum. like this guy on some other forum
"Edit: I found
this link while reading, he says that he "uses Heath Robinsons advice that anything over 1.2 ec is toxic to your plants they cannot use it. Ever since i stayed in the EC 1.0 ( 500 - 550 ppm) range my plants have increased in yield everything about them have improved. NO MORE burning and defieciency problems. I use Veg Nutrients 3 weeks into flower. Flower nutrients the last 4 weeks ( +1week flush). My plants do not yellow or show any signs that they are lacking or hungry. Its the best advice i have ever gotten for feeding my plants.""
dude is obv a tool. if u run aero and experiment hard