Help my 2 plants! Thank you

[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

[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...

[Coolbogge]

Hydro grow, week 3

PH level is 6.3 right now.

I use drip system

I use advanced nutrients (look at picture) ...

[Coolbogge]

I have a had time detecting what the problem with this plant is?

I had some swings in PH, but i don't think it looked like that
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