Brown spots on leaves: Nutrient burn?

[yodan69]

Hey guys,
Yesterday I spotted some brown leaves on my plant. What do you think it is?

Some information:
It's a gorilla glue auto, 17 days old, grown in hydroponic. the ph is 6.0 and ec level is 0.5. I use the flora trio from GH but much less of it, the ratio between them stays the same however.

Cheers

 

[Emilya Green]

Hi @yodan69 and welcome to the forum! This looks like the start of a magnesium deficiency. Add calmag or increase it a bit if already giving it.

 

[Bush Doctor 77]

Welcome. You just got good advice.

 

[onewarmguy]

Hey guys,
Yesterday I spotted some brown leaves on my plant. What do you think it is?

Some information:
It's a gorilla glue auto, 17 days old, grown in hydroponic. the ph is 6.0 and ec level is 0.5. I use the flora trio from GH but much less of it, the ratio between them stays the same however.

Cheers

Hey yodan, this might help. Save it!

 

[yodan69]

Hey guys,
I added some cal-mag to the water but I noticed it's spreading.
@Emilya do you still think cal-mag is the issue?

Looking at the picture from @onewarmguy , thanks by the way, I too think it might be Ca or maybe also P?