pretty much what I thought, sans the light fixture...



you definitely need SOME air exchange, regardless of your levels of humidity.



with your current setup, sounds like just uncovering a small piece of the screen cover will do the trick.



Plastic is normally totally airtight, and so this might not be the best route.. but removing a piece will work.



you could also try covering the top with something a little porous, to allow some air exchange... maybe newspaper, towel, etc.





So, I suggest either poking holes in the plastic , or, removng about a 1 inch strip and measuring the humidity until you have it right.



The tank is about 18" long by 8" wide, so initially remove a strip 1" long by the 8" wide, and contiue if necessary.





I bet removing this 1" strip now will lower the humidity by 10%-20% by tonight.



take care, joe
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Thanks and take care - Joe Rollo

'Tis not the stongest of the species that will eventually survive, nor the most intelligent, but the one most responsive to change' Charles Darwin

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