On the old leaves!!

[Gnc36]

Hello..

My girl getting sick from her old leaves so i'm worried about that..We need help please i don't want to loose my girl..

PPM:200 (with 12liter water)Nute:Gh Micro Gro Bloom(i'm just giving Micro and Gro for this time)
Ph:5.6 (it was 6.3 last time)
Temp:Max:29c Min:21c
Water Temp:Max:23c Min:17c
Humidity:Max:%60 Min:%35
Light:32cm away from the top of the plants(250w Hps with cooltube)

Waiting for your advices please..I don't want to loose her :worried

 

[motherlode]

you should really be using the bloom too - how much m/g you feeding?

if its not lockout from overfeeding and I dont think it is

get your self some techniflora mag-i-cal and add 5ml/gal - them rust spots will stop appearing