I've planted my seeds into pots of 7lt, also set the LEDs about 25cm above substratum level, probably I'll need to put them higher once the first cotton appears 😀
Update: Since I've started I made a lot of mistakes and that drove me crazy until finally, the seeds grew up.
*The far-red lights were on during the first four days along with the spectrum board causing the first two plants near the entrance to be smaller than the other 2 behind.
-BioBizz Light-Mix Substratum
-BioBizz Root-Juice