RH% not going down: anything wrong with my setup?

Hello. Here's my solution... Remove some fan leaves. I've run my grow room for years with just an exhaust fan. The plant breathes called - transpiration - and exhaust moisture from their pours. Take some big fan leaves off each plant to control the rh better. Don't take too many at one time. If you take 1/3 of the leaves off any plant it will send them into shock and they won't start to grow again till they heal. I suggest you take about 10 fan leaves off each plant and see if your rh goes down Good Luck.

I don't see a problem.. Try opening an air flap at the bottom, take some leaves off, circulate more air inside the tent, as long as the lung room is low RH then everything should be fine and it's only small. Try another hygrometer just to check accuracy.

Maybe if the tent is sealed, the dehumidifier cann't reduce the rh more. You can open a bit your tent window to see if it works. Your seeds are auto so you don;t have to worry about light leaks if you do it. I see in your diary that the rh in the tent is 59%, it;s not so bad, surely not dangerous but little bit less is the best for that stage. Good luck!