Un Problemo

Ive noticed a few leaves on one of my plants getting tiny yellow spots and over time the spots start to turn light brown and it look like little burn spots but there is no way the lights are burning them. I keep looking for bugs and cant find any but is it possible that i cant see them? Its also weird because this is happening int he middle of the leaves so its not something that is moving from the edge to the middle or anyhting. Its happening very slowly so Im not too worried about it but i just want to be prepared in case its somehting bad. The picture is terrible quality but its all i got.

bumpin it up

I'm having the same problem, strangely enough it's only happening to one limb of the plant.
I have no idea what's causing it either, but the process seems to have slowed down/stopped, since I started spraying my plants with clean water twice a day...

Possibly nute burn, what kinda nutrients do you give it and how much? how big is the plant/planter as well. Also check the ph of your soil as that may be a problem as well.

Its in about a 2 gal pot and im feeding them very low doses of 20-20-20 nutes. It may be ph, I havent checked it since i started