Two other plants that have sensors and received almost the same amount of water also dropping soil moisture and nutrients in soil.
The only good thing so far is soil moisture seems to settle on 46-65% and has stopped dropping fast. Lets see how long it will stay in the middle of each of these three pots.
My guess the middle layer will be no more than 30% in 3-4 hours.
Actually it was not as bad as I thought. With 2L of watering soil stays wet for a bit over a day. The sensors do not seem to reflect it but I could feel it is wet at the top halfway through.
I will try to use more water then.
BTW, I harvested one plant and even though the buds from it were super dense when they were wet after drying them they feel "airy" too.
Got 2 ounces dried from this plant. It is 50% more than in my first grow. Probably even more as with the first grow I had seeds inside and they definitely add some weight.