That’s great man!
Just to be sure. I would inspect more than the tips though… I would check the whole leaf especially the ones that are cupped…
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Definitely will do.
@Dewb - thanks so much for your help!
U still looking for bugs? Thought we realized it wasnt busted but something else
I really don’t think it’s mites, even russets.
Most problems are environmental or pH related before pests.
Many problems look like other problems, but I’m with @Silversurfer on this one.
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Just more covering off all suggestions - only thought it was fair to check one of the growth tips that died off. Just so all participants could see 
Certainly doesn’t point to bugs at all - more environment… which I have corrected.
So should be good from here out!
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After reading this from the start, i reckon it’s been a combo of wind-burn ( from fan.) and ph off whack, but it seems that @man-bot‘s got it sorted now …
. !?
Good luck with the rest of your grow. 
.!!
Happy growing,
Gaz
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