You do need a humidity dial in there. My 10 gal lost hummidity like crazy, I'd mist every 3 hours, it swung from 90 to 40 in such a short time. I just decided to plant a false bottom. As it has stabalized hummidity. I had 5 plants in there in pots, and it didn't help, till I planted bottom. Just showing an example of why u need one.