Day 71: increased the air flow . Bought a PrimaKlima extractor, max flow 280m3/h, set point 0% to 100% in normal conditions + 100% whenever a predifined temperature setpoint has been reached.
Rigged the 107m3/h small in line extractor precedently in service as an intractor.
The setup has done incredibly good, reducing the humidity % and keeping it stable around 68%, even after watering where it reached 95% before..
Day 72 Watering: 2,3 liters/plant with 2mg/l bloom + 1mg/l Ca Mg
Day 73 Photos shown above
Day 76/19 janv: watered 2.5 liters/plant with no intrants on order to flush the roots.