yellow edge leafs

no im not using osmosis water

i have done 2 weeks before super crop in all tops of the plant ill upload more photos

Looks to be a light burn situation yellow tips turn down and leaf edges up . Try to move your light further away with more air circulation on top of your canopy . Don’t think it’s a nutrient burn or your leaf tip will be curled up . Hope that helps much luck to you .

I see clawing ur leaves look darker burnt tips, and edges all signs point nitrogen toxicity leading to nutrient lockout. Ur probably locked out of potassium due to nitrogen overfeeding.

Senescence is a force to consider. When tips burn, that's typically nute burn, but some deficiencies look that way too.... depends mostly on what you've done lately. if heavy on feed, i'd back off. if not, the deficienciecould be... well, looks immobile, because it is everywhere on plant fairly equally in pictures... i just don't think it is... Looks like a P or K tox -- if any new leaves were around it could be more certain. You'd also start to see spots with either, which hasn't happened, obviosuly. Something is out of balance in your feed system/schedule for this plant. refer to what you've done so far with nutrients. make a better guess.

Could possibly be either Light burn or a Potassium Deficiency. I feel it's probably the latter as you said other plant and the other isn't showing the same symptoms of light burn. Sometimes a cannabis potassium deficiency (like all deficiencies) can be triggered by stressful conditions (for example over watering, heat, transplant, etc) and may clear up on its own after the period of stress is over. Potassium deficiencies are generally more likely to appear when a grower is using heavily filtered or reverse osmosis (RO) water to feed plants, are you? Cheers and happy growing!