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[hugsta]

I would go for a 6 metre heat cord at least. I run a 9metre in mine, but I think you could get away with a 6 metre one. I would also consider a B1 or DL1 microclimate as mrbredli has mentioned. I would go the dimmerstat personally as I believe they will hold a better temp than the pulse proportional DL2/B2 series. The DL1 is dearer, but is a microprocessor based with built in alarms to warn you if your incubator is too hot or too cold. So, if the eggs in the incubator are worth a few dollars, then get a DL1. Check out the link below in my sig for the full range of microclimates and heat cords.