weird growth on top

[THE BEAR]

I've alot of stuff going on in my grow but I haven't used any nutes yet so I think it may be time to start using them,
also, how much do I leave bottom vent open on passive intake vent, 125 cfm extractor fan with carbon filter, 4 inch Ducting,
The tents bowing in slightly with vent ope a few inches ,,,is this right

 

[Bigg Al]

Hey, what's the NPK of your soil. Can you post a pic of the back of the bag? This is my soil(ffof) and what's in it.

 

[THE BEAR]

Hey, what's the NPK of your soil. Can you post a pic of the back of the bag? This is my soil(ffof) and what's in it.View attachment 1256794

I don't have the bag anymore but it seem thier all doing ths now with the top leafs being really skinny and even my new one that are just overewek old looks like its getting it now to, do u think its a pH problem

 

[Bigg Al]

I don't have the bag anymore but it seem thier all doing ths now with the top leafs being really skinny and even my new one that are just overewek old looks like its getting it now to, do u think its a pH problem

To me, it looks like nitrogen toxicity. That's why I wanted to know what the NPK of the soil.

 

[THE BEAR]

The soil is granidol compost, i tryed searching for it their, found the soil but no npk on it

 

[Mañ'O'Green]

Well I do not like what I am finding or seeing here. Lidel grandiol multipurpose compost has a reputation for molds and pathogens in the UK. I found a video showing the back of the bag and their is no guaranteed analysis that I could see. Your plants are showing a wide variety of symptoms and that makes me think of some possibilities. Missing nutrients just some things missing? Too much Nitrogen - curled leaves but the color of the plant is wrong for that - usually dark green. Root Rot - What does the bottom of the pot smell like? Last but not least is pathogens - the spotty leaves?

You do not talk about PH this is critical to know at this stage of diagnostics. What is your light schedule?

What nutrient line do you have available now?

Do you have Botinicare HydroGuard?

Do you have Recharge?

Do you have Kelp and Humic Acid and B-vitamin on hand?

What does the bottom of the pot smell like?

If it is root rot we can fix that.
If it is a nutrient imbalance we can fix that.

If it is a pathogen - game over!

First thing is to do is a foliar application of 5 parts Humic Acid to 2 Parts Kelp and a little B-vitamin. Do this ASAP.

Answer my other questions and I will advise from there.