Mag def early flower?

Hi everyone! I noticed a little bit of rust colored dots on one of my leads. I’m currently on day 21 of flower. I only saw it on this one leaf! Please let me know what you think it is, and what to do fix it, if you do not believe it is a mg def.

Mg or Potassium also. The yellow veins is the bigger clue for mg.
Cal-mag solution.
K-mag solution, or granular fertilizer.

I suspect that the pH of your medium may have drifted too low. Thats when I start to see that stripey burn pattern develop, looks like the start of that in your picture.

Renfro said:

I suspect that the pH of your medium may have drifted too low. Thats when I start to see that stripey burn pattern develop, looks like the start of that in your picture.

Click to expand...

Thanks!