Thread: Wilting/Droopy leaves, yellowish/brown spots on tops of leaves
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Old 06-21-2008, 08:30 AM   #2
bluecheese
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75° at the canopy is ideal so it sounds to me like you need to work on cooling your grow space down with better ventilation if you can't turn on your HPS for the heat.

I've never used CO2, so I can't help you there, but I know it is not a solution to super high temperatures.
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