Yellowing and copperish speckled leaves!?! HELP!

TheSchwarts

Well-Known Member
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Plants are bushy and healthy, recently though I've noticed these sick leaves popping up quickly. I want to fix this problem before it gets worse. They're under 400watts, temps are always at 80F, watered every three days. They are in 10.5 L buckets at the moment, approx. 18inch tall and tons of tops. (Tied 'em down, I can upload pics if needed.) I gave them a jolt of nutes about a week ago, only a quarter strength. Is this nute burn or something else? (Also thought I'd add that I only use distilled water for watering.)
 
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