need help with yellow spots please

three weeks in to veg,small yellow spots appearing on leaves, im veggin under 400mh, hav'nt used any nutes yet,any help would be appreciated.

rawfootage718 said:

three weeks in to veg,small yellow spots appearing on leaves, im veggin under 400mh, hav'nt used any nutes yet,any help would be appreciated.

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Pics would help. Yellow spots can be caused by just about anything, pH, nute deficiency, nute burn, bugs. Rule out the most obvious and easiest things first. Good luck my friend.

it seems every leaf at the bottoms of my plants has been turning yellow and falling off...guess thats just what happens

1st thing that i would do is check the under side of the leaves to make sure that it is not spidermites.Look for small black dot's.If there is no sign of any then it will be a ph problem just make sure that if you are makeing big batches up test every feed because it will alter while stood even with a air stone in.I would also get into a habbit of flushing the plants more than just the once.I flush a couple of times during veg and once every week during flowering.