HELP! Deficit or over fertilized??

[BlackViolette]

Hello everyone!!!

I have a grow room with 85 plants of chocolate mint og of Humboldt seeds in 12 L pots with 8 lights 600w. The grow room is fine the values are optimal, temperature 25° humidity 48-50% and the water temperature of the watering is 19°-20°.
I'm at the fourth week of flowering and I'm giving these products:

PBOOST Aptus: NPK 5-15-0
TOP BOOSTER Aptus: NPK 7-0-4
CANNAZIM
SUPERVIT HESI
CARBOLOAD Advanced
CALL E MAG Advanced
And the last 5 days I'm using the CANNA P\K 13-14

All the plants until today are fine and all the leaves are upwards. From 5 days the Leaves from the TOP of the plant are starting to lose color and there are brown rust holes.
A friend told me that was a deficit of K (Potassium) and are 5 days that I'm giving the CANNA PK 13-14 and I watering 3 times.
Till today I'm not seeing improvements I don't know what to do… What do u think??? please help me!!!

Thanks Everybody!

PS. PH 5.8/6.2 EC 1.1\1.3 Temperature watering 19°-20°

Thanks again!!!

[SirSmksAlot]

Looks like it could be a bit calcium hungry. Are you feeding the cal mag full or half strength?

[BlackViolette]

Hello SirSmksAlot,

Thanks for your answer!!! I'm using Osmosis water and I'm using the Cal mag of advanced 1mlxL and I get the EC of 0.4\0.6 each times that I'm watering, the Ph is 5.8

[SirSmksAlot]

I'd try upping the cal mag a bit to see if that helps. Some plants are hungrier than others.

[BlackViolette]

I'd try upping the cal mag a bit to see if that helps. Some plants are hungrier than others.

I'll try to do that!!! Thanks