I keep getting these brown spots on my leaves, I'm not sure if it's some deficiency or maybe nutrient toxicity. Any advice?

First question,
What is the plant (s) worth to you?
Are they worth investing in $30 worth of EC and PH pens?

Get the pens, you'll use them at every feeding and will pay for themselves in the long term.

Flush the affected plants while reading both the runoff PH and EC.
If what I'm telling you sounds foreign, do a little research on CANNABIS RUNOFF.

Flush to 6.2 PH if possible, and feed using your EC (ppm) meter.
You may want to add a dose of CALMAG to that feeding.

It's kinna like starting over with fresh soil, less the deficiencies.

At this point you need to apply a little science rather than art.
Reading the plants health is an art.
Correcting the situation is a science.

Learn to use both.

Good grow,
GC
 
Okay guys he's in Hydro, 5.8 to 6.2 ph is ideal
 
Also can't see splashing nutes if he doesn't water, my money is on ph or res not being changed regularly. Only time I've seen leaves so this in Hydro is with ph swing or res growing bacteria.


Can you get picture of roots?
 
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