I am expecting my eggs to arrive on Thur or Fri morning, and I am trying frantically to figure out my incubator. I just purchased the basic LG with auto. egg turner but no circulated air fan. I've had it running for about 4 hours, and I was having the hardest time stablizing the temp...we won't even get into the humidity part, yet. I started thinking, I wish I had found a fan kit, when it crossed my mind that I have a dual air-pump for an aquarium that is not in use. I ran my tubing from the pump to the bator--one tube to each middle air hole on the side where the fan would be installed. I've been checking the temp. for the past hour or so, and it seems to be staying dead-on. Do you think this will work okay? Most importantly--another question regarding this alternate air circulation is that there is a light vibration transferring from the pump through the tubing to the bator. Do you think this vibration will cause any problems with the egg development/hatching?