Plants don't grow (automatic)

[BearSmalls]

Hello

I have the impression that my plants have slowed down terribly and it has become a little disturbing.
I have two automatic girls and for two days now their development has been negligible.
For two days in both plants the first two leaves have grown maybe 2 cm, and the next leaves, which they have let out, have not even developed in half.

*The plants I have: Auto Pilot XL (today its 7th day) and Lowers#2 Automatic (today its 6th day)
*Box: 42 cm x 42 cm x 120 cm
*Potted Soil: BioBizz Light-Mix *
* Flowerpots: 9L (Auto Pilot XL) and 7L (Lowers#2)
*Lighting: COB LED Citizen CLU048, color 3500k, 100W (currently set to 60-70W), set to 20 cm from the plants
*Temperature: 22-23 degrees.
*Humidity: 60-80%
*Watering: pH was checked before watering (using GHE test). It came out 6.2.
*There is an inlet and outlet fan (120mm, computer fans).

The plants do not have any stains, discoloration or anything that could indicate any particular problem. The leaves are green, they look healthy.


There was a suspicion that this could be due to lack of CO2. A window was opened in the room where the box is, for the air to flow in + for 9 hours there was a candle burning in the box. This did not change anything. I don't know, maybe it's too short a time to suggest effects somehow, but I'm worried that something might go wrong.

Maybe you have some suggestions about this situation? Am I to be afraid?
Here are the pictures of the plants:

[M_C]

It all looks good to me

[Jingo]

I'd say you're just worrying

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[BearSmalls]

It all looks good to me

But for about 3 days, plants don't grow, maybe a bit. It's really ok and i must wait?

[Jingo]

They are growing underground, later they'll grow above ground.

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[BearSmalls]

They are growing underground, later they'll grow above ground.

I really hope everything goes well, so i'm waiting for results
Thanks for opinion!

[Mac]

Roots grow before the shoots show

[Greengrass]

Honestly fella don't worry, just listen to these ladies and gents
you'll get a quick spurt as they leave the soil so they can catch some life giving light and then the growth is all happening underneath, good watering is your focus now, as in try and coax the roots further out by not watering at the stem but inches away
Don't panic mate we understand your worry but this is just the way they grow in soil
Crack on fella your doing fine
Atb
PS you can ditch the cap fulls of water, make a dome and spraying the inside of it would be better, or even getting a cheap humidifier does the trick

[Greengrass]

Oh and don't go doing anything silly like feeding them ( unless it's root stimulant) or chucking loads of water in
Stick to roughly 250ml of water away from the seedling and you'll be golden
Atb chap

[Cont3]

Patients is a virtue.

If you are looking at them every minute of the day they will look like they are not growing.