What the Deuce? HELP!

pressDUCK

Active Member
Haven't been able to find info on this specific problem. One half of the leaf is turning bright yellow. Pics:

SAM_2560.jpgSAM_2559.jpgSAM_2562.jpgSAM_2563.jpg

Noticed preflowers yesterday, put into 12/12 under 400 watt hps. Fox Farm Ocean soil, FF Grow big @ 1tsp per gallon, just reading the bottle directions, not bothering with ppm. Water is from private well coming out at 7, lowers to around 6.8 with nute solution. The most affected is the Northern Lights (2 others are WW). Saw what I thought was nute burn on the widows early on but the NL seemed to eat it up. Switching nutes to FF Big Bloom tomorrow. Plants are pretty close to light but the closet stays pretty cool and have a fan blowing the leaves all around, working on putting together a cool tube, but I don't think that heat is the issue here.

Any of you nice people know what I should be doing here???

Thanks in advance!
 
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