yeah my mates runs 8 600 watt hps with around 9 plants he nevers flushes the room is a mess and the rez is like a fluro green colour he doest do mix rates just tips it in when he thinks they need it temps range from 26c up to 37 never does ph as he says ph is for the weak and the fucker pulls shits loads lolol i over feed once with not ph corected water and it fucked my plants like wtf is going on here lol