I just purchased a medium vent fan for my tree frog vivarium to keep clean air moving through it. My question is, do I place the fan on top where the air is going into the tank, or in a way that it's sucking the air out of the tank. thanks.
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2 firebelly toads (Ernie and Oscar)
1 american green tree frog (Booger)
1 four line/golden tree frog (Nugget)



