Brown spots

Can someone help me one of my plants has brown spots on it. I have a idea of what it is but tell me what yall think?

Without pics, my guess is that your cat crapped on it

In all seriousness, we're not mind readers. Please do upload some pictures with your grow lights off. At least one up close of the problem, and at least one full plant picture.

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Looks similar (but not exactly what I'm used to) to spider mite damage. Look at the bottom side of the leaves with a scope, loupe or magnifying glass. If you see little black dots running around, you've got mites.

In case that's not what it is, tell us about your grow:

- Medium
- Nutrients you're feeding
- pH of water and water/nutrient mix
- Temperature
- Humidity
- Lights in use

Im using the roots organic soil.
Nutrients:Budda growth,ancient amber, cal mag, fox farm grow big, fox farm big bloom, great white.
Ph water 6.0 -6.5
Temp 70-85
Humidity 40 -66
Light- 1000w spider farmer
1000w luaopp

But my other plants seem to be doing fine

I'd look for pests...carefully. Good luck

I also agree it looks like mites/some kind of pest.