Yellowing on leaves?

[Blackrain]

Problem: Yellow spots on one leaf

Medium/grow method: pure coco

Feed: and supplements used: Biobizz Grow

water source: filtered water from a fish tank

Strain/age: Auto Jack, 31 or 32 days old

light used: Cfl125

Climate: 18-25c°

Additional info: I read that two other people had the same sort of thing when they upped there Biobizz nutrients, not sure if that's the case

Just the one leaf but I want to get into asap before it could be too late

 

[TheMongol]

Hey Blackrain,

could you plz get some pics under normal light? I think it's to early to diagnose now.

 

[Blackrain]

Hey Blackrain,

could you plz get some pics under normal light? I think it's to early to diagnose now.

I noticed this morning it had spread to the 2 other leaves on the same stem but much smaller, I will take a picture when I get home currently at work for the next few hours, any ideas what it could be?

 

[TheMongol]

As i wrote it's to early for diagnose and better pics are needed under natural light and click " Full Image " after uploading.

 

[Blackrain]

Here are some pictures

I believe I've also found some nute burn

 

[TheMongol]

She looks healthy to me, little tip burning, but nothing to panic, wait another week and see how she performe

 

[DABaracuss]

Looks slightly overwatered or little too much N but should be fine like he said. If it's starts to yellow up the food.

 

[Rev. Green Genes]

I agree, she looks good. That one leaf looks like physical damage, the other a very slight hunger. Your on the right track. Those newer pics look better, they are deep green.

 

[Waira]

....looks like some minor physical damage, nothing to sweat! Have you done coco grows before? there are several do's and don't's when using coco, treating it like true soil in a recipe for troubles!...

 

[Blackrain]

....looks like some minor physical damage, nothing to sweat! Have you done coco grows before? there are several do's and don't's when using coco, treating it like true soil in a recipe for troubles!...

It's actually my first grow, she looks the same now but that leaf is slightly more damaged now and I'm not sure Why, maybe I was a little rough with it while I was doing my first LST