Quote:
Originally Posted by KORBIN5895
Your problem is the 250w bulb. That is going to create a vacuum that draws all of the moisture out of the air. Hence why your substrate is wet but you aren't reading 100% humidity.
As for substrate use cocohusk as it doesn't mold.
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This seems to be the most accurate answer. Because as soon as i turn off the lamp, the humidity will jump high and maintain the same till i turn the lamp back on, then it will lower again. However, the tank is pretty big, and i dont know what else will be able to raise the temperature to 83F.