for instance, in my snake room it's naturally below 60 degrees lol so I use a space heater to get me my ambient cold side temp of 80-81. because of the heater I lost almost all moisture in the air so my humidity tanked. I bought a $45 warm mist humidifier, let it run full blast for about an hour every few hours and viola my ambient room humidity is 40 percent and tub humidity is 50. I don't use holes in my tubs because when I did I lost too much humidity. there's a small gap between where the top of the tub meets the rack and that's all they need as far as airflow. plus I look at them near 5 times a day haha. if you need less humidity in the tubs, drill 3 holes, check it, rinse repeat until desired results.
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