Ppm question

[Cubbies69]

They are at 850 at the point just watered to runoff.
? Where should I be

 

[Cubbies69]

Oh amnesia haze photo

 

[oldskol4evr]

They are at 850 at the point just watered to runoff.
? Where should I beView attachment 997593View attachment 997594View attachment 997598

id say your cutting it close right there,see the odd formation on leaf tip from pic,they are trying to make up there mind if they want to cooperate or rebel,bottom showing to much N in my opinion,and you have a burn already.
but all this is just guess work from lack of imfomation just saying sall