For those of you that have used a converted fish tank as an incubator..

[Khrysty]

I've found that the under water heater will only heat the air/incubating medium 5 or so degrees cooler than the set temperature. Does anyone else have this issue? Did you just change the temperature on the heater to a much higher temp than you were going for to counteract it?

And just out of curiosity, which is most important: the temp of the medium or the temp of the air?