Help... burn spots on edges...

Loveit77

New Member
Good day everyone,

In week 4 of flowering, all was well until last reservoir change.... dwc set up...

Stared to notice browning on edges and tips of top leaves by main colas.... not sure if it is due to ph or light burn or heat stress... i added more tap water to reservoir and my ph is sitting now around 7... i think the ph could of been low, but not sure... problem only seems isolated to the top leaves
 

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