Toxicity or Deficiency? Fan leaves looking weird

[AlChemist333]

I’m growing in FFOF. I just flipped to flower and notice my fan leaves looking a little discolored. Anyone knows what might be going on here?
I feed nutes once a week, I supplement with CalMag and MagSulfur. Temp runs about 77-80F during the day with RH ranging from 56-60%.Lights off temps Are 67-70F and RH ranges about 60-65%. The color on the leaves looks black.

 

[kovidkough]

white light plz

 

[AlChemist333]

About the best I can do, I have a SCROG net on and it would be too much work just to move one plant

 

[kovidkough]

how close are your leds? looks like sunburn

 

[AlChemist333]

2000W LED in 4x4, light is 30 in away from top of canopy

 

[kovidkough]

are you using tap why supplement with calmag?

 

[AlChemist333]

Here’s a better look

 

[kovidkough]

tips are also burnt slightly might be excess feed

 

[AlChemist333]

are you using tap why supplement with calmag?

No I use RO water

 

[AlChemist333]

tips are also burnt slightly might be excess feed

I only feed once a week, well nutes and ppms are about 400. I give them CalMag about twice a week at 5 mL a gallon since the showed signs of deficiency early on

 

[kovidkough]

is it just on those few leaves?

 

[AlChemist333]

tips are also burnt slightly might be excess feed

I think I know what it is. It’s wind burn. All the plants close to the fan are burned, none in the back show signs of burn

 

[AlChemist333]

is it just on those few leaves?

I think it’s just wind burn. I only see it on the leaves closer to the fan or is getting hit my the fan the strongest.

 

[kovidkough]

I think I know what it is. It’s wind burn. All the plants close to the fan are burned, none in the back show signs of burn

sweet

 

[Bigjeff420]

It could also be a ph imbalance or root problems do u check the ph regularly I had the same problem

 

[AlChemist333]

It could also be a ph imbalance or root problems do u check the ph regularly I had the same problem

Haven’t checked my runoff in a few weeks, so I’ll do that. I pH my nutrients and water all the time. I’m going to give them pH’d RO water for a couple of waterings and see what happens.

 

[Bigjeff420]

Yeah because that’s what it looks like I don’t think wind would be so sever maybe a light yellowing and a papers feel

 

[Bigjeff420]

Paperish

 

[Wizzlebiz]

Haven’t checked my runoff in a few weeks, so I’ll do that. I pH my nutrients and water all the time. I’m going to give them pH’d RO water for a couple of waterings and see what happens.

Run off out of soil means diddly shit. Won't tell you anything at all.

What goes in is what matters.

And yes it can easily be wind burn as the signs point straight to that.

 

[Trickyticky]

Haven’t checked my runoff in a few weeks, so I’ll do that. I pH my nutrients and water all the time. I’m going to give them pH’d RO water for a couple of waterings and see what happens.

I thought ffof has ph buffers , so no need to be ph Ing your nutes is there