SO i have my general room set up. I've got air coming in. a vent going out.. 4 48" floro tubes on the blue spectrum for veg. BTW i'm not growing marijuana. I've been experimenting with vegetables and flowers for now, waiting for my clearance for a grower's card (medical marijuana is "legal" with a special lisence in RI). I have a space heater heating the room. I have the thermometer set at 65-68 range. It stays around there, but its way too dry in there... the lettuce DWC tank looses at least 1/2 tp 3/4 in of water! and still too dry cause it wilts the ends of the leaves.. I don't have the heater facing directly at the plants, actually its in the corner away from the plants.. just to keep the room above 50 ( there is no heat in the room.) Any suggeations?