Any idea what the discoloration is from? i Thought it was possibly light intensity issue? i had raised my light strength to 45% but noticed slight curling upward of leaves so I decreased back to around 30% but noticed this one had this discoloration On its leaves. The others stopped curling. could it be some sort of pest issue? 2 days ago I did feed .2ml power si, 2ml velo kelp/ per gal.
temp: 78f
rh: 63% chilled x3 330
23” from light
roots organic soil
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Sometimes I get that when I've overwatered. Just let the medium dry out before watering again and it should be fine.