Help a noob grow

This is my second grow and I've seen this discoloration in 2 plants so far. it doesn't seem to stunt growth but it's ugly and may be a serious problem later. If anybody knows what this is and how to fix it Id appreciate the help.

The easiest way to get answers is to give info on your grow.
Lighting, Temps, humidity, indoor, outdoor, nutrients, strain, etc.
It's hard to answer questions when we don't know what your doing.

Sent from my SM-N920V using Rollitup mobile app

SlimTim said:

The easiest way to get answers is to give info on your grow.
Lighting, Temps, humidity, indoor, outdoor, nutrients, strain, etc.
It's hard to answer questions when we don't know what your doing.

Sent from my SM-N920V using Rollitup mobile app

Click to expand...

I'm using 1 400w MH light, humidity is between 40-60 depends on the day, temp is 72-76 During the day and never drops under 60 at night. i use the smallest bit of calmag and buddah grow with 7.0 tap water (just changed to distilled) and its only on my Obama kush and one of my sour diesels.

SlimTim said:

The easiest way to get answers is to give info on your grow.
Lighting, Temps, humidity, indoor, outdoor, nutrients, strain, etc.
It's hard to answer questions when we don't know what your doing.

Sent from my SM-N920V using Rollitup mobile app

Click to expand...

I can't say for sure due to the picture quality, but pretty good chance it's magnesium deficiency.

Solutions:
1. Check PH, if too low, PH up to correct. (check your ph meter calibration now)
2. If PH is ok, add Epsom salt (aka magnesium sulfate) to your next feeding. You can also use a Cal/Mag product, but there is no Calcium issue in the picture and Epsom is better.

nomofatum said:

I can't say for sure due to the picture quality, but pretty good chance it's magnesium deficiency.

Solutions:
1. Check PH, if too low, PH up to correct.
2. If PH is ok, add Epsom salt (aka magnesium sulfate) to your next feeding. You can also use a Cal/Mag product, but there is no Calcium issue in the picture and Epsom is better.

Click to expand...

Fuck yea thanks for the help