Please help with plant diagnosis!

[michael11221]

Hello guys,

What is going on with my plant? Under a 1000w HPS. flushed 1week ago down to 400ppm, Today added advanced nutrients testing at 800ppm with 1.2l per pot.

Thanks again!

 

[AZLandshaper]

whats ph of the nutrient solution? cant really tell in this lighting but looks damn yellow aside from the necrosis.
pour a little DI water through the pot and test the ph of the solution coming out of the pots too.

You spraying the plants w solution? sometime burns will look like this. other times its nutrient related. ph will effect nutrient availability.