Help please with this

[Wgglz]

41 day old GG4 . Been real healthy for whole grow and the all of a sudden showed this on upper leaves just in last day.
Having a hard time nailing what it could be. 4 other plants on tent don’t show same

 

[Jackson]

Fill out the infirmary section. These guys know there shit

 

[Wgglz]

Fill out the infirmary section. These guys know there shit

Isn’t that where I am right now? Serious question I’m new here

 

[Wgglz]

Problem: see pics above yellow and browning spots on upper leaves

Medium/grow method: 50% happy frog 40% ocean forest 10% light warrior

Feed: and supplements used: really only 1 tablespoon of big bloom per gallon last couple weeks. Before that nada. Soil had the nutes Last feeding added less than 1/2 teaspoon of tiger bloom/ gallon

water source: tap water ppm around 200 reads about 9 ph. Bring it down with gh ph down to 6.3-6.5

Strain/age: gorilla glue 4, 41 days

light used: 400 watt HPS. about 16 inches from tops

Climate: 80 degrees F 45% RH

Additional info: other strains in tent ( 5 plants total including another gg4 not showing same symptom

 

[benawhil]

Just one leaf? Did you tuck that leaf under another? Or was it possible under another plants leaf?

 

[Wgglz]

Just one leaf? Did you tuck that leaf under another? Or was it possible under another plants leaf?

Na it’s pretty much the whole top and some middle fans.

 

[benawhil]

Ok. Well hopefully one of the many experts here will help you figure it out. Good luck. Happy growing