I converted a 10 gallon fish tank into an incubator. I have an old woodstove fan on the very top of my incubator and I set it on a dimmer switch so I can control the speed of the fan. I did not drill any vent holes into my incubator at all. The top is foam insulation and I have a small vent on top. I will be setting eggs really soon and I will let you know how it goes!
Sounds like you were able to make the conversion to an incubator too. Nice going on using a wood stove fan! Are you holding consistent temperatures? Any cold spots? Does the air circulate fairly well to the bottom and all around? Fish tanks are much deeper than the LG I use so I'm always curious about how well the fans circulate the air. Great job on the conversion.
Good luck with hatching.
