Brownish dried stain wtf

Ok so this happened over night its crazy, the other plants have signs of this too what could be? Day12 jack herrer 6pots under 600w hps 35C,no ferts only root boost,water 6,5 ,soil canna terra pro,fan constantly blowing,

looks like a splash of nutes from watering etc

From the soil maybe but its a problem,how can i fix it if its gonna spread

littlehorn said:

From the soil maybe but its a problem,how can i fix it if its gonna spread

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stop spilling nutes on the leaves i imagine.....

is it condensation drip from ceiling of grow space?

R1b3n4 said:

stop spilling nutes on the leaves i imagine.....

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Didn't do that. I never watered with nutes,happened over night,didn't even watered that night

OG Gardenz said:

is it condensation drip from ceiling of grow space?

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no

looks like a fluke sort of occurrence wouldnt worry unless it continues.. she looks healthy otherwise

I measured the water runoff ph and its 5.8.its my first time measuring the runof so im not really sure what is supposed to be...

thats pretty good ph runoff for soil.

the thing to measure are you PPM's ... thats how you tell how hot your soil is and and how much to feed