Your guess is right on Kisa. You can pretty much completely close up the viv since when you open the top, that will be enough to change out some small amount of air. Also, the plants produce much of the needed oxygen and the viv maintains itself.
Biggest need to any air movement is some plants which require some type of circulation to thrive.





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you can get all glass hinged lids for your 10 gal at Petco for about 13 bucks. Being all glass that will help keep your humidity where you want it. Just some thoughts. And buying the frogs local you wouldn't have to worry about shipping cost.
