oh ok i see, nice. how do you keep oxygen circulating in there? do you just open it everyday for a while or is it enough ventilation from where the electric wires go in? and i'm guessing once you mist it holds humidity super well. just asking because i was planning to make one out of a cooler with aquarium heaters for the water... i was contemplating getting a polystyrene/styrofoam one so i could poke holes in the top or just stick with a plastic one like yours