HELP! Help my 2 plants! Thank you

[Coolbogge]

I have a had time detecting what the problem with these 2 plants is ?

Hydro grow, week 4 but still use week 3 nuts

PH level is 5.8 right now.

I use drip system

I use advanced nutrients (look at picture)

I have bought a TDS meter and the PPM right now is at 1100

I have the mars hydro TS 3000 and it is at 25% and about 40 cm or 15 inches over the plants. on a 18-6 hour light schedule

The humidity is about 60%, its 27 C / 80,6 F ​warm in there, maybe a bit much now that i think about it.

The water is totally clear, i also have air stones down there so the water keeps getting air.

Could it be Root rot? (The one who shall not be named)
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Thanks in advanced for helping 🍀
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[Gator]

Turn the light down, as far as you can get it to go

 

[Bluey]

PPM is too high. That looks like nute burn to me.

I use EC as ppm has two scales and you didn't say which one your using.

Try an EC of 0.8 at that stage

 

[Coolbogge]

I use a TDS 3

I think i will turn the light down for a bit, change all the water so it's fresh and make it max 800

 

[Bluey]

Read up on PPM and the scales and how to convert to EC.

Good accurate meters will give you an option to read in EC.