This week ia am planning to let it grow just like this. Hopefully I will receive a plant camera next week to monitor my VPD. Also added an IRheater to keep temperature stable The infrared heater does its job, but I find it a waste of electricity, 3.6 kWh in one night. So I've decided to install a gas heater instead, which delivers the same result at a much lower cost and also provides additional CO2. The heater can then keep the temperature above 21˚C with the lights off. The natural gas heater will be used with the lights on. I need to quickly find a CO2 sensor because too much CO2 has a counterproductive effect, as I've already noticed. Approximately 1200 PPM at 32˚C is optimal as long as I can maintain a DLI of 35. Great technology is on the way. Added: Installed CO2 burner, run it for 6 minutes every hour. Temp raises from 22˚C to 27˚C in about 7 minutes. CO2 detector (just colors, no values) doesn't alarm so not above 1500PPM CO monitor also no alarm :) Running for 4 hours now and a visible change is there. Tomorrow I will know if it is ok or not. Added a few pictures. Lets see if we can see the difference tomorrow. 26-05: Added Dimlux Maxi controller for CO2 and VPD. Works nice. 28-05: Topped a few 31-05 Added additional 300W to heat the stuff up. RH is stable but high on 72%. Could add a dehumidifier but since CO2 is already there and my VPD is around 0.8 I thought adding light would be cheaper. Can go up to 33˚C before my floor is heating up too much. Also cleaned the watertank. So from now on they are on Ata Max