Nute burn or deficiency

some tip burn for sure.

have you checked for mites? i see lots of white dots. you'll need a scope or a loupe, not just your eyeballs.
 
Thanks for your help, going to water flush for 24 hours and start low,
if anything (other than nute burn), it kinda looks like Mg deficiency. do you have any epsom salts just in case? 1 gram per gallon should clear it up. but i would do the flush first and go from there.
 
if anything (other than nute burn), it kinda looks like Mg deficiency. do you have any epsom salts just in case? 1 gram per gallon should clear it up. but i would do the flush first and go from there.
I have been giving them a cal/mag supplement, I do have Epsom salts so if they don’t improve after a flush I’ll give it a go,
 
UPDATE, Flushed for 24 hours in ph water, then added nutes at 280ppm,
Tip burn seems to have stopped but woke to this,,,,F6B72730-2C7F-4E5B-BA44-1D53C4FE29CE.jpegB2C0CEB5-0DB9-4ED7-98EA-AEAF1EA22095.jpeg4998F7A3-D8AB-45EE-968B-9B55CAF1103C.pngAC9219B0-AD1E-44BE-B8A5-B9DE6B89D4F9.png
 
Did you figure out what the new problem was?
Yes, I rechecked the roots and there was some slight browning/ gunk, so a root issue,,,
Treated with liquid oxygen and started using Pythoff, they made a good recovery until 3 weeks of flower,,Leaves all started dying off and stopped growing,,
 
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