New Grower - Unidentified Leaf Damage - Help? Pics

PsilentMind

New Member
Hi, I am a first time grower and am having trouble identifying the source of some damage on our leaves. We aren't sure if it is from a deficiency, nute burn, bugs, or from the lights.

We are growing in deep water culture hydroponics, our plants our in their 4th vegetative week. Res and conditions are healthy, good temp, humidity, air flow, light, plenty of dissolved oxygen.
 
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Can't see the pics.
 
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