What's going bad with my plant ?

I'm trying to figure out what is the problem with the growing of my plant.

The upper leafs are quite normal, even if they tend to bend downwards.

The old leafs start with brown spots and then they become yellow and curled on the peaks.

First I supposed a Phosphorus and Calcium deficiency due a high PH and I adjusted the PH to 5,5. Then I guessed an overwatering or an excess of nutrients.

In this Diary you can find all info about the growing state:

I alse atttached some picture that can help understand the plant state.

Can you please help me to understand what's going on ?

Thanks

J.

Magnesium deficiency if it isn't calcium is my guess....or nitrogen burn...brown spot could be a fungus from lack of oxygen getting to roots or just overwatering. Just a guess

Looks like light burn, but i grow in dirt, and autos.

Damtrucker said:

Looks like light burn, but i grow in dirt, and autos.

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See how the serrated tips are all up? Canoeing a bit? My guess. My friend Michi might see this and comment, he knows stuff.

Due to the outline on the edge of the leaves id lean more towards deficiency of.....?. Or too much of any of the above.

Your pH is too low for one thing.

xtsho said:

Your pH is too low for one thing.

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And that really matters to how or if the roots are taking nutes at all...which would make the lady more vulnerable to almost anything. Good call. Makes so much sense can't believe I didn't look at that.

It could be any of those things for sure. i know when i turned my lights down, that "look" went away. Just my experience.

Thx to everyone for your answers and precious advices.
I need to say that I lowered the PH after the brown spots appear (first it was about 6.3) in case the problem was phosforus deficiency due the high PH.
Also my EC is about 1.4 and looking the pictures on the web it seems to me can be overwatering or overnutrition, cause my solution is plenty of many nutrients (maybe too much ?).
Here attached a picture of the roots. It looks ok in your opinion ?
Thx
J.

1.4 EC can be excessive in veg. I’d check the runoff make sure it’s not running hot, 0.7-1.1 EC for veg.
I run 1.4 at peak bloom and only if they need it

Damtrucker said:

Looks like light burn, but i grow in dirt, and autos.

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Not contradicting, but wouldn't the top leaves vs.bottom take the hit?

It seems like it, true enuff. I can't remember exactly how it started, but my autos (first 4 or 5) looked like nute weirdness, and i tried everything through the grows. When I researched and decided to dim lights, most of my problems went away.

Damtrucker said:

It seems like it, true enuff. I can't remember exactly how it started, but my autos (first 4 or 5) looked like nute weirdness, and i tried everything through the grows. When I researched and decided to dim lights, most of my problems went away.

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Lots of times these gals can start a tad funky.....seems to straighten out for me, mostly.

Damtrucker said:

It seems like it, true enuff. I can't remember exactly how it started, but my autos (first 4 or 5) looked like nute weirdness, and i tried everything through the grows. When I researched and decided to dim lights, most of my problems went away.

Click to expand...

Damtrucker said:

It seems like it, true enuff. I can't remember exactly how it started, but my autos (first 4 or 5) looked like nute weirdness, and i tried everything through the grows. When I researched and decided to dim lights, most of my problems went away.

Click to expand...

This fruit punch auto was (last year) just put out of tent because of all that damage going on. Being in sun stopped it and she finished healthy. Part of basis for opinion.

StonedGardener said:

Lots of times these gals can start a tad funky.....seems to straighten out for me, mostly.

Click to expand...

Yep, they tend to be twisty lil sprouts for me too. I use a different soil mux now and it is normalized a lot for me. Was using FF products at first.

thanks again guys. After this discussion I decided to lowed my EC to 1.2 and raise a little bit the PH to 6.1...
Let see what happens
I will let you know.
Thx again

PS: if anyone want to comment the roots status he's just welcome