Plant leaves not doing well. Please help!

Beavercat

Member
I recently had a nutrient burn problem, which I addressed by switching reservoirs and lowering nutrient ppms from 700ish down to about 500. My plant leaves seem to be yellowing. I noticed this morning that somehow the ph had dropped to about 4.1! So I brought it back up to the regular 5.5-6.3. Could the leaves have turned yellow due to low ph, or could it be something else? I'm about 8 weeks into flower with a pure landrace sativa (Durban Poison). I seem to be haveing one problem after another. Ugh...
 
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