Hi, I have a baby tortoise in a tortoise table type enclosure. The table is designed so airflow is great, but the room itself doesn't have much airflow, so I added an aquarium fan to the side. I made it so that the fan blows OUT instead of in, so that there is no wind in the pen, but air gets dragged out to allow better airflow. It seems perfect, and seems to bring the temps right on the cool side during the hot summer weather here. However, the fan always has this sound. It is not terribly serious, but just a constant hum, like buzzzzzzzzz.... about the same as a running computer's buzz. Will this bother the tortoise or does it not matter?