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Canoeing leaves is telling you the light is to close and the heat from it is affecting your plant. The dark green is to much nitrogen. Your ph should be 5.5 to 6.0 for veg time, and 6.0 to 6.5 for flower time. Straight water for a while at a ph of 5.5 for a while and then 5.8. After you flip them and flowers form then bring your ph up into the 6.0 to 6.5 range. Cheers