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So the fan is sucking air out? If so, do you have an intake hole for air to come in that is well ducted to not allow any light leaks? If not, you want one preferably on the opposite side of your box at the bottom.
78-83 temps are just fine.
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You should be fine, as long as you replaced there water source with fresh water, nute free.
Quote: yea the fan sucks the hot air out. This thing has doors and there's a crack going all the way up the middle of the doors. I figured that would be enough to get air in if the other fan is sucking it out. Not to mention I check the temps like 100 times a day. Think the cracks enough air or should I make another hole?
The crack might be enough, but during flowering, if you flower in there, you are going to want to close that up and any other places light can enter. It does not take a lot of light to confuse a plant. I know from experience. My first 2 grows had a very confused plant in the same spot in my cab, right next to my intake hole. The hole is connected to 2 feet of ducting. Light reflected off my floor and throughout the ducting and onto that one plant. I have since fixed the prob.
I would make another hole, but that's me. It might make it cooler and might make it quieter as well if you have any sounds of air being pulled through the crack. It might allow for more even air exchange as well.
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When a leaf is damaged no matter what the cause, it will not heal itself. You just need to make sure it does not get any worse. That does not include pale yellowing leaves that get green again.
So in your pics, I see some brown tips, wrinkling, and small necrosis. Those will never go away, if it does not spread, then you are okay and you have fixed your problem.
Your plants look good. I would not worry to much about those bottom single leaves. They don't make it to long anyways.
Also, what were the temps at that where causing the heat stress? I would think that LED did not get that hot.
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