would u PLEASE, elaborate? i get the ppm reference, I THINK. do u just mean alot of green left, during flush? cause i read 2 days, for hydro, aero. u can ignore that... tastes n burns, like carbon, or chems. so a wk with advanced's flawless finish, a wk of ph'd ro, which is always fun cause I'm ph- OCD. and if I'm still not slitting my wrists- another wk- and i can NEVER get em to look anorexic, before "timber!"... and i tried 400sppm, in their last wk... i just lose mass, not leaf color. but it smells right, burns right, scopes right, oils out at right %, works right n smokes, like breathin air, at sea lvl. still... if i shoot a finished pic and u see a soil flush finished pic, you'd guess it was my first grow and i had nothin cured, for personal.